added option to the mesh plot to plot generated zones

[cyrush]

Description

Adds Show generate zones option to the mesh plot.

Default is off.

When this option is on, we skip using the original zone ids to screen mesh lines.

Use for this is best demonstrated with mfem multi res data.

Off:

On:

Resolves #18550

Type of change

• Bug fix~~
• New feature~~
• Documentation update~~
• Other~~

How Has This Been Tested?

Reminders:

• Please follow the style guidelines of this project.
• Please perform a self-review of your code before submitting a PR and asking others to review it.
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Checklist:

• I have commented my code where applicable.~~
• I have updated the release notes.~~
• I have made corresponding changes to the documentation.~~
• I have added debugging support to my changes.~~
• I have added tests that prove my fix is effective or that my feature works.~~
• I have confirmed new and existing unit tests pass locally with my changes.~~
• I have added new baselines for any new tests to the repo.~~
• I have NOT made any changes to protocol or public interfaces in an RC branch.~~

[cyrush]

I used xmledit to make these changes, surprised to see the Target dropped?