[editor] TextEditor: Improve styling of all controls

This makes the controls fit better into the fieldset box.

projects/editor/src/app/text-editor/rich-text-editor.component.scss

@@ -74,7 +74,7 @@ button.active {
   height: 55px;
   box-sizing: content-box !important;
   border-radius: 3px;
-  padding: 5px 5px 10px 5px;
+  padding: 2px 5px 15px 5px;
 }
 
 .fx-column-start-stretch {