res:launcher:: fix wrong icon problem after uninstall.

tower: https://tower.im/projects/1c0cd0c59ef941298c6e6b2ba6833b91/todos/e93a0f4f22f0481c8d01deb5918f3166/

Change-Id: Ifc3f3f6918bcd6089ec51ca23947146a7a24f3b6
res:launcher:: fix scroll problem.

first switch to category page and scroll it, then switch to favor page
or search something, then switch to category page again and scroll, gets
wrong place.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/9f80185b7ebb498fb72becf532d50fb9/?proto=https
Change-Id: If4cd726390fa2fa5acda4df280e32e41df0d0708