ENH: Adding Plot Options toggle for mouseover info/marker

[bmorris3]

Description

Originally implemented as a PR on top of #1894 (pllim#9), the commit in this PR (to main) allows users to see or hide the mouseover marker and info, by adding a toggle in the "Settings" dropdown in the Plot Options plugin:

JDAT-3038.mov

Change log entry

• Is a change log needed? If yes, is it added to CHANGES.rst? If you want to avoid merge conflicts,
  list the proposed change log here for review and add to CHANGES.rst before merge. If no, maintainer
  should add a no-changelog-entry-needed label.

Checklist for package maintainer(s)

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• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a milestone set? Set this to bugfix milestone if this is a bug fix and needs to be released ASAP; otherwise, set this to the next major release milestone.
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)?

🐱

[codecov]

Codecov Report

Base: 91.94% // Head: 91.94% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (971ce19) compared to base (ee804ea).
Patch coverage: 83.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1986      +/-   ##
==========================================
- Coverage   91.94%   91.94%   -0.01%     
==========================================
  Files         140      140              
  Lines       15315    15321       +6     
==========================================
+ Hits        14082    14087       +5     
- Misses       1233     1234       +1     

Impacted Files	Coverage Δ
jdaviz/app.py	94.41% <ø> (ø)
jdaviz/configs/specviz/plugins/viewers.py	85.95% <66.66%> (-0.17%)	⬇️
...nfigs/default/plugins/plot_options/plot_options.py	98.10% <100.00%> (+0.03%)	⬆️

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[pllim]

Where does this PR stand now? Were we waiting for UI/UX advise? Were we waiting for PO feedback? Is this still relevant if we have to move the mouseover info somewhere else?

[bmorris3]

Where does this PR stand now?

I'm not sure, @pllim. @camipacifici?

[kecnry]

Where does this PR stand now?

I had left a number of comments on the original PR that I think still stand.

[kecnry]

See #1953 for a proposed migration of this logic into the markers plugin integration within the mouseover display.

Screen.Recording.2023-02-14.at.9.49.36.AM.mov