PR: Fix some issues after the IPython Console migration

[dalthviz]

Description of Changes

• Keep focus in the Editor after startup
• Don't show restart dialog to apply preferences at startup (check restart preferences dialog validation)

Issue(s) Resolved

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

[ccordoba12]

@dalthviz, now spyder/app/tests/test_mainwindow.py::test_get_help_editor is either failing or freezing in our pip slot (this has happened twice).

Could you debug and try to solve that problem? I don't know if it's related to this PR or not.

[pep8speaks]

Hello @dalthviz! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-11-17 17:48:21 UTC

[ccordoba12]

Thanks a lot for your work on this @dalthviz! It's working as expected.

I left a small comment, otherwise looks good to me.

[ccordoba12]

Looks good to me now, thanks @dalthviz!