systray: Icon size and priority fixes

b47b3d01 could also have been part of this MR.

Fixes: #571 (closed)

mentioned in commit b47b3d01

changed milestone to %4.17.1

mentioned in issue #571 (closed)

added 16 commits

• 0da1af81...ea3aa662 - 11 commits from branch xfce:master
• 8c81b52c - systray: Remove artificial icon size increase
• 7ae4c9e0 - systray: Do not treat symbolic icon size separately
• 320e7dc8 - systray: Consider the specified icon size as maximum
• 40010a6f - systray: Simplify `sn_icon_box_apply_icon()`
• 4e4c018b - systray: Fully honor symbolic icon priority

Compare with previous version

merged

mentioned in issue #619 (closed)