network: fix password box popup issue

Remember connection path when activating access point,
do not check current access point if is the master
one. Besides, do not use uuid in PasswordBox which
is equals to connection path in terms of functionally.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/c0d9158bdbb04f08a355e7e1ccfd4dce/
Change-Id: Id7fc8e7c7a4e14554ee2aeaeaee35ab16a74908c