Windows: restore window as maximized

[kkuepper]

Right now, it's not restored as maximized. Since I have a Mac it would be a lot easier if someone working on Windows could work on this.

See electron/main.ts where window.setBounds() is called.
electron/electron#526 should give some hints on how to fix it.

[leo-schick]

There is definitively something to fix here. I am not sure if it should be maximized by default, but a bit bigger would be great by default. When I first opened it, it looked like this on my screen:

resolution 1920x1080 (1080p).

[kkuepper]

@leo-schick For now, we're just using a safe size that doesn't cause problems. It would be better to increase the size if the screen has more space, but that requires additional code.

Also, it's only relevant the first time you open the app. After that it uses the screen size it had when it was closed.

Feel free to create a PR: https://github.com/bcc-code/bmm-web/blob/main/electron/main.ts