diff --git a/IPython/html/static/style/ipython.min.css b/IPython/html/static/style/ipython.min.css
index c0743fe..3b6a7d3 100644
--- a/IPython/html/static/style/ipython.min.css
+++ b/IPython/html/static/style/ipython.min.css
@@ -184,12 +184,12 @@ div.cell.text_cell.rendered{padding:0}
 .widget-numeric-text{width:150px}
 .widget-progress{width:363px}.widget-progress .bar{-webkit-transition:none;-moz-transition:none;-ms-transition:none;-o-transition:none;transition:none}
 .widget-combo-btn{min-width:138px;}
-.widget-box{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box}
-.widget-hbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
-.widget-hbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch;height:30px}
-.widget-vbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
-.widget-vbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch;width:30px}
+.widget-box{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start}
+.widget-hbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
+.widget-hbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch;height:30px}
+.widget-vbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
+.widget-vbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch;width:30px}
 .widget-modal{overflow:hidden;position:absolute !important;top:0;left:0;margin-left:0 !important}
 .widget-modal-body{max-height:none !important}
-.widget-container{box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box}
+.widget-container{box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start}
 .docked-widget-modal{overflow:hidden;position:relative !important;top:0 !important;left:0 !important;margin-left:0 !important}
diff --git a/IPython/html/static/style/style.min.css b/IPython/html/static/style/style.min.css
index d99cf75..8f7fb95 100644
--- a/IPython/html/static/style/style.min.css
+++ b/IPython/html/static/style/style.min.css
@@ -1461,14 +1461,14 @@ div.cell.text_cell.rendered{padding:0}
 .widget-numeric-text{width:150px}
 .widget-progress{width:363px}.widget-progress .bar{-webkit-transition:none;-moz-transition:none;-ms-transition:none;-o-transition:none;transition:none}
 .widget-combo-btn{min-width:138px;}
-.widget-box{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box}
-.widget-hbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
-.widget-hbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch;height:30px}
-.widget-vbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
-.widget-vbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch;width:30px}
+.widget-box{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start}
+.widget-hbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch}
+.widget-hbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:horizontal;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:horizontal;-moz-box-align:stretch;display:box;box-orient:horizontal;box-align:stretch;display:flex;flex-direction:row;align-items:stretch;height:30px}
+.widget-vbox{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch}
+.widget-vbox-single{margin:5px;-webkit-box-pack:start;-moz-box-pack:start;box-pack:start;justify-content:flex-start;box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start;display:-webkit-box;-webkit-box-orient:vertical;-webkit-box-align:stretch;display:-moz-box;-moz-box-orient:vertical;-moz-box-align:stretch;display:box;box-orient:vertical;box-align:stretch;width:100%;display:flex;flex-direction:column;align-items:stretch;width:30px}
 .widget-modal{overflow:hidden;position:absolute !important;top:0;left:0;margin-left:0 !important}
 .widget-modal-body{max-height:none !important}
-.widget-container{box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box}
+.widget-container{box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;-webkit-box-align:start;-moz-box-align:start;box-align:start;align-items:flex-start}
 .docked-widget-modal{overflow:hidden;position:relative !important;top:0 !important;left:0 !important;margin-left:0 !important}
 body{background-color:#fff}
 body.notebook_app{overflow:hidden}