ODAEU-305 - adding the possibility to send to more than one recipient + adding db patch for the change
                    - implementing reply to all functionality
                    - improving user dropdown search - adding filtering functionality to it - now search will filter by firstName/lastName/email/phone/username
                    - improving display of users in the search dropdown + from/to fields
ODAEU-305 - patch for db entity changes in Message class
Merge remote-tracking branch 'origin/arti-messages' into develop