Adwaita: Fix fine-tune mode for scales with marks

Remove old fine-tune marks style, add margins for fine-tune marks to
compensate trough growth, prevent horizontal fine-tune trough growth in
horizontal direction, prevent vertical fine-tune trough growth in
vertical direction.

Closes GNOME/gtk#1799
4 jobs for adwaita-scales-marks-fintune-fix-master in 19 minutes and 37 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #260266
fedora-x86_64

00:10:45

passed #260267
win32
msys2-mingw32

00:04:49

 
  Flatpak
passed #260268
flatpak:demo

00:08:50

passed #260269
flatpak:widget-factory

00:08:50