PR: Disable fullscreen mode when running on WSL (Layout)

[jsbautista]

Description of Changes

Fix in Fullscreen Mode child windows are hidden and have no mouse control in WSL.
A method was added to detect if the system is running on WSL, and it was used to disable the fullscreen mode option in case the system is running on WSL.

Issue(s) Resolved

Fixes #22736

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:
@jsbautista

[ccordoba12]

Some minor suggestions for you @jsbautista, the rest looks good to me.

[ccordoba12]

@dalthviz, please check manually if this disables fullscreen mode for you on WSL (not urgent though because it's for 6.0.6).

[ccordoba12]

@dalthviz, gentle reminder for you to test this PR when you have some time. Thanks!

[dalthviz]

Gave this a check locally and seems like the validation is working 👍 (the action to enter fullscreen mode is deactivated when launching Spyder from WSL):

[dalthviz]

/show binder

[github-actions]

👈 Launch a Binder instance on this branch

[ccordoba12]

Thanks @dalthviz for checking!

[ccordoba12]

Looks good to me now, thanks @jsbautista!

[ccordoba12]

@meeseeksdev please backport to 6.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 6.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 1751de3dd663862fa2d7e3e62a1b61ba4faa673d

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #24009: PR: Disable fullscreen mode when running on WSL (Layout)'

4. Push to a named branch:

git push YOURFORK 6.x:auto-backport-of-pr-24009-on-6.x

5. Create a PR against branch 6.x, I would have named this PR:

"Backport PR #24009 on branch 6.x (PR: Disable fullscreen mode when running on WSL (Layout))"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.