Shortcuts for dialogs don't work if the main window is not in focus

Summary:

Shortcuts for dialogs don't work if the main window is not in focus

Steps to reproduce:

• open Inkscape
• open filter editor and undock it (right-click and move the tab to new window)
• Click on this dialog
• press SHIFT + CONTROL + P (prefernces)

What happened?

-nothing

What should have happened?

-preferences should open

Sample attachments:

Version Info:

- Inkscape Version: 1.1-dev (fdf98dc, 2020-12-15)
- Operating System: win 10
- Operating System version: ...