QComboBox does not update

[Lykurg]

How could that possibly be? There is nothing related to this combo, other than its signal being connected to the slot of an object. Nothing is accessing or changing the combo in any way. Other inputs in the same widget, like a QTextEdit and some QLineEdits update perfectly fine.

Don't ask me

I use the Eclipse Integration of Designer and closed the Property Editor by accident. How do I get it back?

Window -> Show View -> Others :: Qt -> Qt C++ Property Editor