custom scrolling values 1/2

ported/modified from https://gerrit.omnirom.org/#/c/4251/
originally written by Yanuar Harry <ai.the.smarties.physics@gmail.com>

Change-Id: I7f23fe736507f836137c5d6dc0b5fd2ad4a95462
Merge "custom scrolling values 1/2" into kk44
isolate navbar flashing black to isolated occurances in low profile mode

improved but not fixed.  no more free time for a few days.

Change-Id: I5a04c317d58263c0e3230fde860620c923076527
Merge remote-tracking branch 'upstream/kk44' into kk44