(Bug 43066) Replace search box with item selector

- patch set 5: Improved removing native suggestion context, added some doc
- patch set 6: Further improvement of suggestion context removal
- patch set 7: rebase
- patch set 8: Set correct file group

Change-Id: Ic70e323c118ed066c7846de57651076865106b2d
Merge "(Bug 43066) Replace search box with item selector"