Tweak to list and element save, when creating new, make sure table do…

…esn't end in _ or element doesn't start with _. That messes up the tablename___elementname handling whenever we split on ___, if there is an extra _ we don't know if it belongs on the end of table or start of field.

administrator/components/com_fabrik/models/element.php

@@ -507,6 +507,9 @@ public function save($data)
 
 		if ($new)
 		{
+		    // Can't have elements starting with _
+		    $name = ltrim($name, '_');
+		    $data['name'] = $name;
 			// Have to forcefully set group id otherwise list model id is blank
 			$elementModel->getElement()->group_id = $data['group_id'];
 		}

administrator/components/com_fabrik/models/list.php

@@ -14,8 +14,8 @@
 
 require_once 'fabmodeladmin.php';
 
-use \Joomla\Utilities\ArrayHelper;
-use \Joomla\Registry\Registry;
+use Joomla\Registry\Registry;
+use Joomla\Utilities\ArrayHelper;
 
 /**
  * Fabrik Admin List Model
@@ -696,6 +696,9 @@ public function save($data)
 			// Mysql will force db table names to lower case even if you set the db name to upper case - so use clean()
 			$newTable = FabrikString::clean($newTable);
 
+			// can't have table names ending in _
+            $newTable = rtrim($newTable, '_');
+
 			// Check the entered database table doesn't already exist
 			if ($newTable != '' && $this->databaseTableExists($newTable))
 			{