Highlight date changes in Gantt

To help identify changes made to action due dates, date changes are now highlighted in Gantt View.

This makes it easier for users — specifically project managers — to run "what if" scenarios in Gantt before taking action. Now, when a date is changed, table of information on the left will be highlighted. The highlight will persist until you change a new date or leave and come back to the project.

Thank you to Peg from TAPFIN for requesting this feature!