installer:update installer ui for wubi auto_mode

desription:
1.mouse pointer
2.background
3.disable window drag
4.window in center
5.installer succeed page ui
6.installer failed page ui
7.fixed that installer page boxShadow is black--remove it
8.fixed the contextmenu of slideshow body is disable

tower:https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/b622c3d8528b4d74bdfffc7783a17f18/

Change-Id: I7ddc6fb918ed6ff044769a815d3aa621adc4dd6a