dock-applets: fix password input invalid issue

Remove all connection session code that may cause
secret filling process interrupt.

tower: https://tower.im/projects/15081ba156b14fa4bd6d9e82f91edff3/todos/c2508ac8a16c40a1a107349eb78cd4b5/
Change-Id: I6ebcd1f2be075d7206165189e668e1a81284a5fc