refs #3977: TASK-3977 - Mentions message types export
refs #3977: TASK-3977 - Mentions update fields
refs #3977: TASK-3977 - Mentions first base implementation
refs #3977: TASK-3977 - Mentions node mentions implemented
refs #3977: TASK-3977 - Mentions node refactored messages
refs #3977: TASK-3977 - Mentions node remove comments
refs #3977: TASK-3977 - Mentions node fix coding standards
refs #3977: TASK-3977 - Mentions comments implementation
refs #3977: TASK-3977 - Mentions comments message types templates + refactoring
refs #3977: TASK-3977 - Checkbox option to manage messages
refs #3977: TASK-3977 - Export messages