Move copyright and credits in seperate line of footer

This makes the footer more readable instead of a blob of characters

Change-Id: Ib2aa944082b775898c53fddc6ec577595e5e2759

resources/screen-common.less

@@ -186,7 +186,9 @@ div.suggestions {
 		display: inline;
 		padding-right: 1em;
 	}
-	#lastmod {
+	#lastmod,
+	#credits,
+	#copyright {
 		display: block;
 	}
 }