HdyComboRow overlaps too much with GtkDropDown
In GTK3 this widget didn't mirror GtkComboBox API because it was old and terrible, and instead used list models and name functions. In GTK4 there's GtkDropDown and HdyComboRow is now literally an action row + copypasta from GtkDropDown, with the only difference being styling.
Is it really that important to keep it? Or should we instead add the ability to use the kind of styling we want to GtkDropDown (most noticeably, popover arrow and position) and just use that?