launcher:: fix uninstall problem.

too manay signals.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/ac5d3963f334428bbd8ad2f9d5bd9e82/

Change-Id: I4c377750c2226c8592b0e23c38bf85bb4c796ea9