System message began to be implemented.
DB migration: new system message fields in settings.
Database fields cannot have dashes. Updated as necessary.
New settings can be updated now.
Load modal.
Table settings value is now text, because it can have larger values.
Close buttons.
Close should be rightmost, as it's the "deafult".
Prevent any new system message to be shown if forgotten.
If there's new content on the system message, redisplay.
Merge branch 'refs/heads/feature/system-message' into development
Bump app version.