[4.0] Change plugin statistics popup to be alertdialog

[Quy]

Pull Request for Issue #22507 .

Summary of Changes

The plugin statistics popup should not have a role=alert as this role does not allow for a response by the user, instead it should have a role=alertdialog.

Testing Instructions

Enable System - Joomla! Statistics plugin.
View markup of the popup.
See role="alert".
Apply PR.
See role="alertdialog".

[brianteeman]

I have tested this item ✅ successfully on 4f55581

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[alikon]

I have tested this item ✅ successfully on 4f55581

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/27189.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/27189.}

[wilsonge]

Thanks!