[5.1] Fix fancy-select for Dark Mode

[LadySolveig]

Pull Request for Issue #42221#issuecomment-1989830009.

Summary of Changes

Fix for Fancy-Select with new Dark Mode Switch

Testing Instructions

Apply patch run npm install.
Check the template Atum parameters Dark mode.

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[Fedik]

Thanks! Looks good, I try to test later ;)

[brianteeman]

I have tested this item ✅ successfully on 0644262

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[Quy]

I have tested this item ✅ successfully on 0644262

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43008.}

[Quy]

RTC

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[bembelimen]

Thx