adds test for adding users
add confirmation when trying to delete stage that has tasks and an error for when trying to create a stage that already exists
adds test  for removing users from tasks
shows warning when trying to delete a task
shows warning when closing an edit task tab, still need to keep track of edits
print out list of sessions on db change
Merge branch 'multiselect_users' of github.com:slash-slash-no-comment-WPI-cs3733/wpi-suite into Add_remove_users_test

Conflicts:
	TaskManager/src/main/java/taskManager/view/ScrollList.java
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' into server#pushing
start of long-polling
make a constant for the timeout
merge branch users-at-logon into server#pushing
long-polling sort of works
remove ignore next response flag, as it is unneeded now
don't leave program running due to open connections
update after drag/drop incase anything was missed
merge branch dev-gradle into server#pushing
Drag to trash to delete