input mapping parent fix

resources/la_properties.c

@@ -1814,6 +1814,7 @@ void la_RegisterInternalProps(){
             laAddOperatorProperty(p,"remove","Remove","Remove this entry","LA_remove_input_mapping_entry",U'🞫',0);
             laAddOperatorProperty(p,"select_signal","Select","Select signal","LA_input_mapping_entry_select_signal",0,0);
             laAddOperatorProperty(p,"select_key","Select Key","Select key","LA_input_mapping_entry_select_key",0,0);
+            laAddSubGroup(p,"parent","Parent","Parent group","la_input_mapping",0,0,0,offsetof(laInputMappingEntry,Parent),0,0,0,0,0,0,0,LA_UDF_REFER);
         }
         p = laAddPropertyContainer("la_custom_signal", "Custom Signal", "Custom signal", 0,0,sizeof(laCustomSignal), 0,0,1);{
             laAddStringProperty(p, "name", "Name", "The name of this mapping", 0,0,0,"Mapping", 1, offsetof(laCustomSignal, Name), 0,0,0,0,LA_AS_IDENTIFIER);