Style the flag 'D' on watchlist and recentchanges

Added a new module 'wikibase.client.changeslist' and add it, when ever a
line is generated for wikidata.

Change-Id: Ia6e9cc6eba9704e6ca7f0600881edaef045bb4da
Merge "Style the flag 'D' on watchlist and recentchanges"