Re-use property editor as prevalue editor

[bjarnef]

Currently we have both property editors and prevalue editors.

Property editors are used in data type instances or as macro parameter editors.

Prevalue editors are using in configurating of property eidtors or in settings/styles of grid editor.

However much it this code is redundant or isn't consistent. For example we now have Media Picker 3z but imagepicker, mediapicker and mediafolderpicker is based on older media pickers.

Furthermore a boolean prevalue editor and toogle (true/false) property editor does pretty much the same.

Maybe we still need prevalue editors and property editors, but wrapping the logic in components, so limited code is added to view and controller of prevalue/property editors.

Perhaps it would also be possible in future to configurate (property) editors whether it should be available as prevalue editor too?