return GUI data for selected endpoint and not just the first one in the list (#1520)

* return GUI data for selected endpoint and not just the first one in the list

* remove await because it was not the root cause fix

* fix validating endpoint too

* fixing other instances where this method is called

* cleanup

* add cypress test

* make sure still visible

* handle test that is specific to zigbee

* change to skip if not zigbee in case other protocols are added