Prefer -symbolic monochrome system tray icon if it exists

Nate Grahamrequested to merge
work/monochrome-tray-icon into master

The System Tray icon is now monochrome (if such an icon exists in the icon theme), and the main icon remains colorful.

BUG: 419347 FIXED-IN: 23.12

image

@broulik

Merge request reports