Request: Allow for theming of the MacOS title bar

[CillySu]

Checklist

Please replace the space inside the brackets with an x if the following items apply:

• [x] I've verified that I use the latest version of the add-on by redownloading it from AnkiWeb
• [x] I've checked if anyone else suggested this feature before by looking through the issue reports.

What Anki version are you using?

*Please open Anki, go to Help → About (windows) or Anki → About Anki (mac) to find the version. Edit the value between the backticks below

2.1.46

Problem case

Is your feature request related to a problem? If so, please describe it here. E.g.: "My workflow is such and such, and this and that would help."

Solution

It would be nice if, like in many other programs such as VSCode it were possible to style the title bar in MacOS, I believe this is possible within the Qt framework. See below for an example of a styled titlebar

More information

[BlueGreenMagick]

It seems like the title bar is drawn by the OS instead of qt, and it doesn't seem easy to change it in Python + Qt.

https://forum.qt.io/topic/72335/changing-window-titlebar-colour-in-macos

If I'm wrong and there's an easy way to change titlebar color, I'm willing to implement it!