Allow sending the number of lcd columns as a parameter

This is needed for https://phabricator.wikimedia.org/T76196
and may also nbe useful for many other features.

css/jquery.uls.css

@@ -26,10 +26,12 @@
 	background-clip: padding-box;
 }
 
+/*
 .uls-wide {
 	min-width: 715px;
 	width: 45%;
 }
+*/
 
 .uls-title-region a {
 	padding-left: 15px;