res/app:dock:: fix trayicon and applet problem.

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/12107008efb64dac92f90dbb03fc37a7/#a259c812d00c4c909e46a4aed115d7a1
Change-Id: I309d90be64e6df42c0dc0e6dc4bed91a90ed1ae0