[Reg 6.8 -> 6.9] QML 'instanceof' doesn't work with selectors

If you use custom extraSelectors than in Qt 6.9+ you can't call 'instanceof' on such types - the result is always false. It worked well before in Qt 6.7-6.8.

I'm attaching an example with a test SelectorObject. If you launch it you'll see text "bad" for any Qt 6.9+ version. If you comment line 13 in main.cpp where 'test' extraSelector is setup than everything works as it should be - 'good'.