osd:update keyboard-switch ui and monitors-switch ui finally

1.update keyboard-switch padding and background opactiy
2.update monitors-switch background opactiy

tower:https://tower.im/projects/8a6342c556be4c4eb898fdd7fd6fcb2f/todos/a1b98b6efd154ca7aa82f4e6521e3c69/

tower:https://tower.im/projects/8a6342c556be4c4eb898fdd7fd6fcb2f/todos/51e67e67674d4f0cb3c009345602d60c/

Change-Id: I78ad9b7f1a6615e7489a754f8fca433cc96f4185