guide:use DockMode instead of DockReal

1.in welcome Page:test launcher show signal
2.in DesktopZoneSetting Page:mouse move ok
3.All dock Page:use DockMode instead of DockReal
4.fixed dock icon postion and pointer area size problem
5.update to newest icon

TODO:
    1.update the pointer area image to newest
    2.adjust the pointer area image size to icon

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/2248172ec59a45b687ec8c0646e414c8/
Change-Id: I87a9eda97ed93fba7ddfd73a8d5d1cd826cbb450