res:dock:: change time's the margin to right

40 -> 20

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/300d28919bd14d17a0a49207fee6e972/
Change-Id: Ifa4c40039f6170fc6407a3a8b7e71805036fc430