Autogenerated relation names in dialog instead of ids

The autogenerated ids are quite long and this leads that they where very unconfortable to use in the configuration of relation reference in the attribute type widget of layer properties - attribute form. So now the names are used in the combo instead of the ids. This effects only the GUI.

Fix: #17441

Author: signedav

src/gui/editorwidgets/qgsrelationreferenceconfigdlg.cpp

@@ -36,7 +36,7 @@ QgsRelationReferenceConfigDlg::QgsRelationReferenceConfigDlg( QgsVectorLayer *vl
 
   Q_FOREACH ( const QgsRelation &relation, vl->referencingRelations( fieldIdx ) )
   {
-    mComboRelation->addItem( QStringLiteral( "%1 (%2)" ).arg( relation.id(), relation.referencedLayerId() ), relation.id() );
+    mComboRelation->addItem( QStringLiteral( "%1 (%2)" ).arg( relation.name(), relation.referencedLayerId() ), relation.id() );
     if ( relation.referencedLayer() )
     {
       mExpressionWidget->setField( relation.referencedLayer()->displayExpression() );