Add aria-label to the unread message and notification icons.
Add aria-label to the total conversations, unread conversations
and unread messages in the overview.
Add aria-label to the pending contact requests in the overview
and also in the contacts tab.
Add aria-hidden to the last message date.
Passing the last message (which can virtually contain any character) as
a parameter for the {{#str}} mustache helper can break the JSON parsing
which eventually leads to the breakage of the messaging UI.
So for simplicity, revert the addition of the 'conversationlastmessage'
language string and render the sender and the last message as separate
elements.
* Added missing icon mappings for font-awesome
* Fixed focus on dialogue button when it opens
* Fixed UI updates on user block / unblock
* Fix jQuery syntax error when sending message with quotes
* Fix message/index.php opening drawer when no conversation found
* Fix placeholders rendered for new requests
