Close button / window buttons can be hidden by resizing left panel
Issue: In the initial view the left panel was to small to show the window buttons (close, minimize).
Noticed with version 42.0-1ubuntu1 in Ubuntu 22.04 (USB live disk without updates)
Proposal:
- ensure that the initial view provides all window buttons
- don't allow resizing the left panel smaller than required to show all top bar elements
- if dragged smaller, collapse panel and move window buttons to the right top bar