remove useless classes

IPython/frontend/html/notebook/static/css/notebook.less

@@ -8,6 +8,7 b''
 
 body {
     overflow: hidden;
+    background-color:@notebook_background;
 }
 
 blockquote {
@@ -80,6 +81,7 b' span#notebook_name {'
 
 .toolbar {
     padding: 3px 15px;
+    border-bottom: @borderwidth @border_color solid;
 }
 
 #maintoolbar > select, #maintoolbar label {
@@ -126,7 +128,6 b' div#notebook {'
     /* This spaces the cell away from the edge of the notebook area */
     padding: 5px 5px 15px 5px;
     margin: 0px;
-    background-color: @notebook_background;
 }
 
 div#pager_splitter {

IPython/frontend/html/notebook/static/js/page.js

@@ -18,7 +18,7 b' var IPython = (function (IPython) {'
 
     Page.prototype.style = function () {
         $('div#header').addClass('border-box-sizing').
-            addClass('ui-widget ui-widget-content').
+            addClass('ui-widget').
             css('border-top-style','none').
             css('border-left-style','none').
             css('border-right-style','none');

IPython/frontend/html/notebook/static/js/savewidget.js

@@ -25,8 +25,8 b' var IPython = (function (IPython) {'
 
     SaveWidget.prototype.style = function () {
         this.element.find('span#save_widget').addClass('ui-widget');
-        this.element.find('span#notebook_name').addClass('ui-widget ui-widget-content');
-        this.element.find('span#save_status').addClass('ui-widget ui-widget-content')
+        this.element.find('span#notebook_name').addClass('ui-widget');
+        this.element.find('span#save_status').addClass('ui-widget')
             .css({border: 'none', 'margin-left': '20px'});
     };
 

IPython/frontend/html/notebook/static/js/toolbar.js

@@ -86,7 +86,7 b' var IPython = (function (IPython) {'
 
     ToolBar.prototype.style = function () {
         this.element.addClass('border-box-sizing').
-            addClass('ui-widget ui-widget-content toolbar').
+            addClass('toolbar').
             css('border-top-style','none').
             css('border-left-style','none').
             css('border-right-style','none');