Toolbar (e.g. command bar) toggle show/hidden states are not preserved during the fullscreen transition

Summary:

Toolbar (e.g. command bar) toggle show/hidden states are not preserved during the fullscreen transition.

From the behavior, it seems that there are separate boolean variables for the normal mode / fullscreen mode, and the variables are not synchronized during the screen transition.

Steps to reproduce:

• open Inkscape (assuming the vanilla state)
• hide the command bar from the View->Show/Hide menu
• go to the fullscreen mode

What happened?

• the command bar erroneously appears
• if you open the View->Show/Hide menu, the checkbox is off, indicating hidden; but the bar is shown
• if you further toggle the checkbox; now the checkbox is on, indicating shown; then the bar is hidden

What should have happened?

the toggle state should be preserved during the screen transitions

Sample attachments: video showing the similar behavior in the opposite situation: Go from (hidden, fullscreen) -> (hidden, normal), but the bar gets shown

cinnamon-20200807-3

Version Info:

- Inkscape Version: Inkscape 1.0 (4035a4fb49, 2020-05-01)
- Operating System: Fedora 32 with Cinnamon desktop
- Operating System version: Linux 5.7.11-200.fc32.x86_64 (from uname)