1. There seems ot be a bug w/r to QT5's signal and slots concerning when passing a reference to const JSON data -  pqPresetDialog's apply preset signal should pass JSON data when a preset is selected.  If the signal is connected to a slot that takes in no argumenets the signal is properly connected.  However, if you connect the signal to a slot that taked in the reference to the JSON object, the connect method says there is no such slot.

Workaround - changed the slot signature to take in no arguements.

2. In Qt5 , Frames no longer have a setShown method but instead now use setVisible.