add confirmation when trying to delete stage that has tasks and an error for when trying to create a stage that already exists
shows warning when trying to delete a task
shows warning when closing an edit task tab, still need to keep track of edits
checks if a task is edited and warns you when closing the edit task view, also warns you when viewing a requirement without selecting a requirement
updated the dialog boxes, stopped to warn user for creating tasks/view requirement since it should be a validation thing
merge dev-gradle into warnings
Merge branch 'dev-gradle' of https://github.com/slash-slash-no-comment-WPI-cs3733/wpi-suite into warnings
Merge branch 'dev-gradle' of github.com:slash-slash-no-comment-WPI-cs3733/wpi-suite into warnings