[4.0] Fix switcher colors

[ciar4n]

Pull Request for Issue #21639 .

Summary of Changes

#21615 removed some required functions and variables which killed the color variations in the switcher. This PR fixes that.

Testing Instructions

Apply PR and run node build.js --compile-ce

Check switcher colors (article edit)

Before

See #21639

After

Documentation Changes Required

[infograf768]

NOT for PatchTester users. Requires npm install (or node)

[infograf768]

I have tested this item ✅ successfully on 70db24f

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[ghost]

@infograf768 thanks for "NOT for PatchTester users. Requires npm install (or node)".

[brianteeman]

I have tested this item ✅ successfully on 70db24f

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/21658.}

[ghost]

Ready to Commit after two successful tests.

[wilsonge]

Thanks!

[ciar4n]

Thanks for the tests!