[5.2] Add custom css

[rdeutz]

Pull Request for Issue #41205 .

Summary of Changes

Checked if class is set and added it to the fields

Testing Instructions

copied from the issue

$options=array();
$o = new stdClass();
$o->value = 1;
$o->text = 'option 1';
$options[] = $o;

$attribs=array();
$attribs['class'] = 'MyCLass'
HTMLHelper::_('select.radiolist', $options, 'fieldname', $attribs);

Actual result BEFORE applying this Pull Request

<div class="controls">
  <div class="form-check form-check-inline">
    <input type="radio" class="form-check-input"  name="fieldname" id="fieldname1" value="1" class="MyCLass">
    <label for="fieldname1" class="form-check-label" id="fieldname1-lbl">option 1</label>
  </div>
</div>

class attribute is duplicated

Expected result AFTER applying this Pull Request

<div class="controls">
  <div class="form-check form-check-inline">
    <input type="radio" class="form-check-input MyCLass"  name="fieldname" id="fieldname1" value="1">
    <label for="fieldname1" class="form-check-label" id="fieldname1-lbl">option 1</label>
  </div>
</div>

Both the form-check-input and MyCLass should be merged in one class attribute

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

[rdeutz]

Thanks @richard67

[Quy]

I have tested this item ✅ successfully on 8932488

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[alikon]

I have tested this item ✅ successfully on 8932488

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43392.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43392.}

[rdeutz]

just for the record, I used this PR to pin the mysql service in our testing to 8.3.0 because it seems we have a problem with 8.4 and the integration tests