Issue #164 - adding the leave tangle item in main menu
Issue #164 - adding the function to call the confirmation dialog
Issue #164 - adding the signature of the method that sends the leave request
Issue #164 - adding the confirmation dialog
Issue #164 - sending leaving request
Issue #164 - creating new Home Activity upon leaving
Issue #164 - finalizing the frontend
Issue #164 - editing the way deleting records
Issue #164 - fixing a bug
Issue #164 - pulling develop and solving conflicts
Issue #164 - removing unused code
Merge branch 'develop' of https://github.com/ndomar/megasoft-14 into C1_HebaAamer_#19_LeaveTangle
Issue #164 - adding not sending tangle id in the request
Issue #164 - adding expired session test case
Issue #164 - adding user not in tangle
Issue #164 - adding fixture class for leave tangle end point
Issue #164 - adding createUser and createSession functions in the fixture
Issue #164 - adding createTangle and createUserTangle functions in the fixtures
Issue #164 - adding createRequest to the fixture
Issue #164 - adding createOffer to the fixture