[4.0] Convert jgrid if (icon) to switch (icon)

[N6REJ]

Pull Request for Issue # .

Summary of Changes

converts multiple if statements into switch statements.

Testing Instructions

inspect administrator/index.php?option=com_content&view=articles
verify icons display properly using fas fa- in class names.
apply pr.
verify icons still use fas fa- in class names and display the same icons.

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Documentation Changes Required

none

[N6REJ]

@hans2103 how's this look?

[N6REJ]

@infograf768 can you try your 3rd party app that had icon issues before and let me know if it still works?

[hans2103]

@N6REJ Looking good!
Tested the changes successfully

[hans2103]

I have tested this item ✅ successfully on c2057ce

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/30482.}

[sandewt]

I have tested this item ✅ successfully on c2057ce

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/30482.}

[infograf768]

@infograf768 can you try your 3rd party app that had icon issues before and let me know if it still works?

Looks like this has no impact on com_localise.

[N6REJ]

@Quy not at all, we'll be making more pr's as we progress.. @hans2103 will merge my changes and his as we complete the conversions.

[N6REJ]

closing since we've merged it now #30470