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.
Changed the settings page in the message drawer to display all message
notification processors (e.g. email, mobile, jabber) for the user to
configure based on which processors are enabled on the site.
* Add clarification to delete messages lang strings
* Stop message polling when sending a message to fix UI bug
* Publish update last message event when polling finds more messages
* Remove logged in user from group conversation participants list
* Use user object to fetch user preferences to reduce DB calls
* Remove animated slide transitions because the browser breaks when
showing some conversations
* 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
* Fix navigation from view_contact to view_conversation on an action
such as blocking
* Fix default open message section on overview page depending on which
section has conversations
* Fix message/index.php for users who haven't yet started a
conversation
Add new messaging profile preferences to allow users to choose who
can message them:
- By default, users can select between 'My contacts only' and 'My
contacts and anyone in my courses'
- When $CFG->messagingallusers is enabled, a new option is displayed
also: 'Anyone on the site'. For users who have selected this option,
if $CFG->messagingallusers is disabled, the behaviour will be changed
to 'My contacts and anyone in my courses'
