PR: Add flag to prevent adding initial empty QAction on Mac for non-migrated menus

[dalthviz]

Description of Changes

• Wrote at least one-line docstrings (for any new functions)
• Added unit test(s) covering the changes (if testable)

• Included a screenshot or animation (if affecting the UI, see Licecap)

Flag to preserve UI even with a mix of migrated and non-migrated menus

Preview:

Issue(s) Resolved

Fixes #14661

Affirmation

By submitting this Pull Request or typing my (user)name below,
I affirm the Developer Certificate of Origin
with respect to all commits and content included in this PR,
and understand I am releasing the same under Spyder's MIT (Expat) license.

I certify the above statement is true and correct: dalthviz

[dalthviz]

Note: Also, @ccordoba12 @steff456, seems like there is a bug with the menuBar on Mac. You need to make it disappear and appear again (for example changing to another application and going back to Spyder) to be able to interact with it. Seems like this issue is also present in 4.x as far as I could test. Is there an issue created already for that?

[ccordoba12]

Seems like this issue is also present in 4.x as far as I could test. Is there an issue created already for that?

I think this happens because we use python instead of pythonw to start Spyder in development mode. I think @steff456 and @juanis2112 reported it before, but it shouldn't be an issue for our Mac app or when you install Spyder with conda install spyder.

Could you test that to be sure?

[steff456]

This PR fixes the empty menu entry 🎉

The other issue we haven't been able to fix it, but I think that we are accustomed to changing the app once it opens for now.

[steff456]

This PR is ready for merge!!

[ccordoba12]

Looks good to me, thanks @dalthviz!

[dalthviz]

Could you test that to be sure?

Seems like this only happens indeed when running with python instead of pythonw (when running pythonw bootstrap.py the menus work without the need to change the focus from the application)

[ccordoba12]

Great! Thanks @dalthviz for the confirmation.

@steff456, I thought you said running pythow bootstrap.py generated an error for you. Could you verify that again?