budgie-panel: offset and truncated content in dock mode

[JoshStrobl]

Reporter Info

• Pocillo version: 0.12.1
• GTK3 version: 3.24.51
• Distribution (and version): Fedora Budgie 44 (rawhide)
• Related application (and version): budgie-panel

Actual Issue
While working on fixes for budgie-panel in dock-mode (see WIP BuddiesOfBudgie/budgie-desktop#829), I noticed that the panel is offset and there is truncated / cut off content. This doesn't happen with Materia. Issue is location independent, the gap and truncation occurs regardless of panel position.

Screenshot from Pocillo:

Screenshot from Materia:

Steps to Reproduce

1. Clone budgie-desktop and check out branch 828-bug-dock-mode-always-left-centres-icon-tasklist
2. Create left panel, size 36, spacing 2, shadow enabled, stylize regions enabled, dock mode enabled
3. Add a menu, IconTasklist, clock for noticeable effect
4. See the gap and truncation (e.g. Budgie Menu start icon, ITL icons lacking space, clock text)

Additional Info