css: quick fix after IE11 changes

Temporary fix so that the add panel panel works properly. This will
break a3f15ced6805d3d949d02c5a8a1d5267a6dac3a7.

public/sass/pages/_dashboard.scss

@@ -33,7 +33,7 @@ div.flot-text {
   border: $panel-border;
   position: relative;
   border-radius: 3px;
-  //height: 100%;
+  height: 100%;
 
   &.panel-transparent {
     background-color: transparent;