Apply content padding to data-after-content on small resolutions

Doesn't matter on the large layouts because there's padding around content, but on
these it's only the content padding applying everywhere...

Also maybe kinda sorta included half this patch in the previous. Oops.

Change-Id: I7319ad49098fa6593cda498196ce2d89ca843537

resources/screen-desktop-small.less

@@ -2,8 +2,6 @@
 
 // Single-column layout with dropdown menus
 
-// Redundant sidebar category list and stuff
-
 #mw-content-block {
 	padding: 0;
 }
@@ -20,6 +18,10 @@
 
 .categories-bottom();
 
+#mw-data-after-content {
+	padding: 0 @content-padding;
+}
+
 // Header navigation
 
 .sidebar-chunk {