Improved the Admin Fields Relations area to allow more custom coding without the need of selecting Join Field/s. Improved the dynamic get string fixing implementation to avoid conflict when the same field name is used in multiple joined tables requiering string fixing. Fixed gh-322 to insure ID is always readonly even if override detected. Added new feature to control access and view/hide control per/field.

admin/models/fields/listfields.php

@@ -88,6 +88,7 @@ class JFormFieldListfields extends JFormFieldList
 				$options = array();
 				if ($items)
 				{
+					$options[] = JHtml::_('select.option', '', JText::_('COM_COMPONENTBUILDER_SELECT_AN_OPTION'));
 					foreach($items as $item)
 					{
 						$options[] = JHtml::_('select.option', $item->id, $item->name);