Allow pinning the code editor popup

[snowe2010]

Proposed changes

The code editor popup now has a button to allow 'pinning' the editor to
the screen so that it does not disappear when you click outside of it.
This currently only works if the right panel stays open, so that means
you cannot click inside of the app window unless it's on your component.
Anything else will dismiss the right panel and the popup will disappear,
even if pinned.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Further comments

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🔨 Latest commit	ded0c8b

[FalkWolsky]

Super cool and handy feature! Thank you very much!!