Author: Sara Arjona
MDL-64715 message: add support for self conversations
Added new MESSAGE_CONVERSATION_TYPE_SELF type for self-conversations
and upgraded legacy self-conversations to the new type, removing
repeated members in the message_conversation_members table.
Besides, from now, a self-conversation will be created by default for
all the existing users.
All the self-conversations have been also starred and a default message
will be displayed always to explain how to use them.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=734b198fd36c273f2412bb47ffbc7c1c75079391
http://github.com/moodle/moodle/commit/734b198fd36c273f2412bb47ffbc7c1c75079391
+ 3.7 en [deleteallselfconfirm,core_message]
+ 3.7 en [deleteselectedmessagesconfirmselfconversation,core_message]
+ 3.7 en [selfconversation,core_message]
+ 3.7 en [selfconversationdefaultmessage,core_message]