Improve title rendering on menu bar change

[msujew]

What it does

Closes #13311

Awaits the first rendering of the menu bar and then updates the title widget position.

How to test

1. Resize the electron window until the title widget disappears.
2. Change the menu bar visibility preference.
3. Confirm that the title widget appears/disappears as expected.

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[JonasHelming]

Looks good to me. Maybe we should wait until we get another response from the corresponding bug report?

[msujew]

I'm fine with waiting, the next release won't happen for a while anyway 👍

[msujew]

I'll merge this for now. If the other issue crops up again, I'm happy to create another PR.