Smart Search PHP Notice when saving filter

[chrisdavenport]

Pull Request for Issue #10187 .

Summary of Changes

Start and end dates for filters are stored in params and not as individual table columns.

Testing Instructions

• Set error reporting to maximum.
• Create a new filter or modify an existing one. You should see "PHP Notice: Undefined property: FinderTableFilter::$d2 in ROOT/administrator/components/com_finder/tables/filter.php on line 83"
• Apply this PR and try again.
• Also try entering a start date which is after the end date. After saving the dates should be swapped.

[andrepereiradasilva]

I have tested this item ✅ successfully on 2be76dd

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10192.}

[brianteeman]

I have tested this item ✅ successfully on 2be76dd

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10192.}

[brianteeman]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/10192.}