Proper fix to support all legacy knob features

*Yay! Got the log working cleanly and made code a lot more readable.

*Added support for log and reverse log.

*Improved coloring/drawing.

*Support for dragging that is in line with the object height (legacy behavior). This actually makes sense since it poses as a circular slider whose length (or height in this case) corresponds with the movable range. It also prevents the need to use a large amount of the screen estate to change its value with a mouse. Besides, there is always a shift+click.
6 jobs for footils-knob-improvements in 225 minutes and 46 seconds (queued for 374 minutes and 53 seconds)
latest
Status Name Job ID Coverage
  Test
passed debian_stretch_x86_64_deb #22019
debian stretch x86_64

00:39:18

passed osx_10.11_x86_64_dmg #22021
osx v10.11 dmg

00:23:52

passed osx_10.8_x86_64_dmg #22022
osx v10.8 dmg

00:21:46

failed raspbian_stretch_armv7l_deb #22024
raspbian arm stretch

passed ubuntu_16.04_x86_64_deb #22020
ubuntu v16.04 x86_64

00:38:18

passed windows_i386_innosetup #22023
windows i386

01:42:31

 
Name Stage Failure
failed
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