Added javadoc for ChannelUtil and made its constructor private.
Issue: MIRTH-2849
Added tooltip to regex text area.
Issue: MIRTH-2879
Fixed formatting when multiple trigger validation errors exist.
Issue: MIRTH-2879
Renamed primary and foreign key constraints for donkey channel tables to be consistent with index names.
Issue: MIRTH-2884
Made the casing of the constraint names consistent for derby.
Issue: MIRTH-2884
Slight optimization
Issue: MIRTH-2516