universal-access: Reverse Repeat Keys Speed direction

Since the gsettings is for the repeat-interval but the
GUI is for Speed, we need to reverse the mapped direction.

We have to turn off the fill indicator (has_origin) for Speed
since it fills the right side instead of the left. We turn
off the indicator for Delay to match.

Closes: #311
(cherry picked from commit ae75ebca)
2 jobs for gnome-3-28 in 12 minutes and 19 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #185183
build

00:04:03

 
  Test
passed #185184
test

00:08:16