Add title to list item of language link

The key itemtitle can be used to set the title of the actual list item
element. This is useful for article badges as it is already done by the js
hack to add a title for the icon.

Bug: 60717
Change-Id: Ic05c7535d7a35d9ee523373e1e3620e72887459d
Merge "Add title to list item of language link"