OR-541 Use ellipsis in the community list widget

Also add a title attribute to the <a> tag, so the full community title is
shown on mouseover
OR-541 Fix close cross on community avatar selection

Now works even on smartphone resolution. Fixed the left position of the cross
in relation to the canvas size, that is set to 128px
OR-541 community link in the communities list stops at the end of the title

The link show not include the community type (open, restricted etc...)
OR-584 Display links in messages
OR-584 Load linkify module to fix tests
OR-584 Remove twitter mention
Merge pull request #378 in OR/rse from OR/rse-chamerling:OR-584-links-in-messages to master

* commit '2bcfd559d03e4116dffeb7e540e668f812395947':
  OR-584 Remove twitter mention
  OR-584 Load linkify module to fix tests
  OR-584 Display links in messages
Merge pull request #376 in OR/rse from ~MBAILLY/rse:OR-541-integration-ticket to master

* commit '8419c1dfa5f1e86e5e6c929a33a19d54e88a5a47':
  OR-541 community link in the communities list stops at the end of the title
  OR-541 Fix close cross on community avatar selection
  OR-541 Use ellipsis in the community list widget