Capability for Current User to Leave a Trip #71
Description
Issue summary
Given the the current user the ability to remove themselves as a collaborator on a trip.
Expected behavior
Current user can click a button on the edit trip page that is separate from the collaborators field that allows the current user to remove themselves as a collaborator on a trip.
Actual behavior
As of PR #73 a user cannot remove themselves from a trip. This is because Edit Trip Modal collaborator section only shows collaborators other than the current user to remove from the Trip. This design allows the add and edit trip modals to use the same code to get the collaboratorUidArray.