ToC: Use table layout for the toc

Table layout is much better in combinging wrapping, using as much
space as available and floating content at the same time.

This is similar to how we do this for all our skins

Change-Id: I23408d1aa6773af05f2ee197356a9b04feb524f0

resources/screen-common.less

@@ -446,10 +446,9 @@ ul {
 
 /* Tables of contents */
 ul#filetoc,
-#toc,
 .toc,
 .mw-warning {
-	display: inline-block;
+	display: table;
 	.box;
 	padding: 1.25em 1.75em;
 	margin: 1em 0;