Is there an existing issue for this?

• I have searched the existing issues and found none matching what I'm reporting.

Is the feature related to a problem or existing issue?

No response

Describe the feature, why the feature matters to you, and what benefits the feature will bring about.

Support Ctrl+Q to quit the application as it is one of the basic shortcuts, see https://developer.gnome.org/hig/reference/keyboard.html

Describe any alternatives you've considered.

Alt+F4 works as alternative.

Additional context

No response