minimal mce editor style changes to borders

cms/static/sass/views/_unit.scss

@@ -453,6 +453,10 @@ body.course.unit {
         font-weight: 700;
       }
 
+      .row {
+        margin-bottom: 0px;
+      }
+
       // Module Actions
       .module-actions {
         @include box-shadow(inset 0 1px 1px $shadow);

common/static/js/vendor/tiny_mce/themes/advanced/skins/studio/ui.css

@@ -25,8 +25,8 @@
 
 /* Layout */
 .studioSkin table.mceLayout {border:0;}
-.studioSkin table.mceLayout tr.mceFirst td {border-top:1px solid #3c3c3c;}
-.studioSkin table.mceLayout tr.mceLast td {border-bottom:1px solid #3c3c3c;}
+.studioSkin table.mceLayout tr.mceFirst td {border-top: 1px solid #D1DCE6;}
+.studioSkin table.mceLayout tr.mceLast td {border-bottom:none;}
 .studioSkin table.mceToolbar, .studioSkin tr.mceFirst .mceToolbar tr td, .studioSkin tr.mceLast .mceToolbar tr td {border:0; margin:0; padding:0;}
 .studioSkin td.mceToolbar {
   background: -webkit-linear-gradient(top, #d4dee8, #c9d5e2);
@@ -36,7 +36,7 @@
   background: linear-gradient(top, #d4dee8, #c9d5e2);
   border: 1px solid #3c3c3c;
   border-bottom-color: #a5aaaf;
-  border-radius: 3px 3px 0 0;
+  border-radius: 0;
   padding: 10px 10px 9px;
   vertical-align: top;
 }