[4.0] Modal close rtl

[brianteeman]

Apply PR
rebuild css

The modal close X is now correctly in the top left and with correct margins

[infograf768]

I have tested this item ✅ successfully on 46a5432

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[ghost]

I have tested this item ✅ successfully on 46a5432

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/32137.}

[alikon]

RTC

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[wilsonge]

I think we can delete the .close class at the top of the file which was the old class for this