Fix padding in edit table buttons

Author: Dennis Benz

src/styles/extensions/components/_drag-and-drop.scss

@@ -87,6 +87,7 @@
             position: absolute;
             top: 9px;
             right: 10px;
+            padding: 0;
 
             &.add {
                 background-image: url("#{$img-path}/plus-icon.png");