use box-flex to layout quickhelp

IPython/html/static/notebook/js/quickhelp.js

@@ -109,8 +109,8 b' var IPython = (function (IPython) {'
         var i, half, n;
         var div = $('<div/>').append($(title));
         var sub_div = $('<div/>').addClass('hbox');
-        var col1 = $('<div/>').addClass('box-flex0');
-        var col2 = $('<div/>').addClass('box-flex0');
+        var col1 = $('<div/>').addClass('box-flex1');
+        var col2 = $('<div/>').addClass('box-flex1');
         n = shortcuts.length;
         half = ~~(n/2);  // Truncate :)
         for (i=0; i<half; i++) { col1.append( build_one(shortcuts[i]) ); }

IPython/html/static/notebook/less/quickhelp.less

@@ -1,11 +1,15 b''
+.quickhelp {
+    .hbox();
+}
 .shortcut_key {
     display: inline-block;
-    width: 16ex;
+    width: 20ex;
     text-align: right;
     font-family: @monoFontFamily;
 }
 
 .shortcut_descr {
     display: inline-block;
+    .box-flex1();
 }
 

IPython/html/static/style/style.min.css

@@ -1515,8 +1515,9 b' ul#help_menu li a{overflow:hidden;padding-right:2.2em}ul#help_menu li a i{margin'
 div#pager_splitter{height:8px}
 #pager-container{position:relative;padding:15px 0}
 div#pager{font-size:14px;line-height:20px;overflow:auto;display:none}div#pager pre{font-size:13px;line-height:1.21429em;color:#000;background-color:#f7f7f7;padding:.4em}
-.shortcut_key{display:inline-block;width:16ex;text-align:right;font-family:monospace}
-.shortcut_descr{display:inline-block}
+.quickhelp{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}
+.shortcut_key{display:inline-block;width:20ex;text-align:right;font-family:monospace}
+.shortcut_descr{display:inline-block;-webkit-box-flex:1;-moz-box-flex:1;box-flex:1;flex:1}
 span#save_widget{padding:0 5px;margin-top:12px}
 span#checkpoint_status,span#autosave_status{font-size:small}
 @media (max-width:767px){span#save_widget{font-size:small} span#checkpoint_status,span#autosave_status{font-size:x-small}}@media (max-width:767px){span#checkpoint_status,span#autosave_status{display:none}}@media (min-width:768px) and (max-width:979px){span#checkpoint_status{display:none} span#autosave_status{font-size:x-small}}.toolbar{padding:0 10px;margin-top:-5px}.toolbar select,.toolbar label{width:auto;height:26px;vertical-align:middle;margin-right:2px;margin-bottom:0;display:inline;font-size:92%;margin-left:.3em;margin-right:.3em;padding:0;padding-top:3px}