Linux GTK dark mode only: table header disappears when unselect a row

Created by: laksono

Describe the bug Removing selection causes the table header disappears

To Reproduce

1. Set dark mode on a vnc server Linux host
2. Set light mode on Linux machine
3. Run the viewer on the linux machine
4. Open a database
5. Remove a selection by collapsing the parent node
6. Header becomes invisible

Expected behavior Header shouldn't be invisible

Screenshots

Platform (please complete the following information):

• OS: Linux
• Architecture x86