qt: fix broken media library pages with Qt 6.9
Qt 6.9 introduces TableViewDelegate in Qt Quick Controls [1], this
causes name conflict here as the import is not explicitly stated
when resolving TableViewDelegate in TableViewExt.qml currently.
Alternatively the name can be kept, and Widgets.TableViewDelegate
can be used to specify which TableViewDelegate to use, but this
is probably safer than that approach.
[1] https://github.com/qt/qtdeclarative/commit/0edf656a2ea2c3fec34892b5f878855d0b094af7
Request review @chub.