specify end-space height in less

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

@@ -89,7 +89,7 @@ var IPython = (function (IPython) {
         // edited, but is too low on the page, which browsers will do automatically.
         var that = this;
         this.container = $("<div/>").addClass("container").attr("id", "notebook-container");
-        var end_space = $('<div/>').addClass('end_space').height("30%");
+        var end_space = $('<div/>').addClass('end_space');
         end_space.dblclick(function (e) {
             if (that.read_only) return;
             var ncells = that.ncells();

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

@@ -59,3 +59,6 @@ p {
 	margin-bottom:0;
 }
 
+.end_space {
+  height: 200px;
+}

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

@@ -1496,6 +1496,7 @@ p.dialog{padding:0.2em;}
 pre,code,kbd,samp{white-space:pre-wrap;}
 #fonttest{font-family:monospace;}
 p{margin-bottom:0;}
+.end_space{height:200px;}
 #notification_area{z-index:10;}
 .notification_widget{padding:6px 12px;margin-top:1px;z-index:10;border:1px solid #ccc;border-radius:4px;background:rgba(240, 240, 240, 0.5);}
 div.output_area{padding:0px;page-break-inside:avoid;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;}