Merging ub-launcher3-qt-dev, build 5484164

Test: Manual

Bug:123661124
 Bug:126450861
 Bug:126733945
 Bug:128923737
 Bug:128925509
 Bug:129216366
 Bug:129216367
 Bug:129226741
 Bug:129365634
 Bug:129505642
 Bug:130021301
 Bug:130385136
 Bug:130391709
 Bug:130393177
 Bug:130401317
 Bug:130574920
 Bug:130750270

Change-Id: I71221f8a74a39727d91da8083a303278aed9eb6c