Merge branch 'note-edit-background-color' into 'master'

Edit form background color on highlighted note

## What does this MR do?

Added white background to edit form when in a highlighted note

## What are the relevant issue numbers?

Closes #18101 

## Screenshots (if relevant)

![Screen_Shot_2016-06-02_at_11.24.20](/uploads/c7c7fe710aa74d86152a109560fd0ebe/Screen_Shot_2016-06-02_at_11.24.20.png)

See merge request !4435

app/assets/stylesheets/pages/note_form.scss

@@ -129,17 +129,8 @@
   display: none;
   font-size: 15px;
-  .form-actions {
-    padding-left: 20px;
-
-    .btn-save {
-      float: left;
-    }
-
-    .note-form-option {
-      float: left;
-      padding: 2px 0 0 25px;
-    }
+  .md-area {
+    background-color: #fff;
   }
 }