Add macros to PyDMFrame

[Ryan-McClanahan]

What's the problem this feature will solve? The two ways most people group widgets together in designer is to put the widgets in an embedded display or a PyDMFrame. It would be nice If we were able to add macros to PyDMFrames as we would not have to include an extra file in the display

Describe the solution you'd like Add macros to PyDMFrame functionality