refactor addStudent, bugfix updateList after delete, check organisationsform ersterStudent

system/phrasesupdate.php

@@ -29902,7 +29902,27 @@ array(
 				'insertvon' => 'system'
 			)
 		)
-	)
+	),
+	array(
+		'app' => 'core',
+		'category' => 'lehre',
+		'phrase' => 'error_benutzerBereitsVorhanden',
+		'insertvon' => 'system',
+		'phrases' => array(
+			array(
+				'sprache' => 'German',
+				'text' => 'Benutzer für uid {uid} bereits vorhanden',
+				'description' => '',
+				'insertvon' => 'system'
+			),
+			array(
+				'sprache' => 'English',
+				'text' => 'Error: User for uid {uid} already exists',
+				'description' => '',
+				'insertvon' => 'system'
+			)
+		)
+	),
 );