Revert "Bug 1043293 - [Verticalhome] use "touchend" instead of "click" to launch applications r=kgrandon"

This reverts commit 87ffc8423953bf052ed2b953c7f5e0133cbf1384.
Bug 1047390 - Performance regression while panning. r=cwiiis
Merge pull request #22420 from vingtetun/performance.regression.panning

Bug 1047390 - Performance regression while panning. r=cwiiis