Prevent edtisection icons from getting clipped

Not an issue in most fonts, but some padding should prevent it more consistently regardless.

Change-Id: Ib8b8daeb8288044d3b85b0d6b4c9e86ea70993f9

resources/screen-common.less

@@ -345,6 +345,7 @@ a.mw-selflink {
 	background-repeat: no-repeat;
 	background-position: left bottom;
 	padding-left: 20px;
+	padding-top: 0.5em;
 
 	a {
 		display: inline-block;