Problem saving/loading marker controller

[jessegreenberg]

In a project @brettfiedler and @terracoda were working on, the wrong value for marker controlling was selected.

            "controlType": "MARKERS",
            "controlTypeFamily": "MARKERS",

controlType should not be "MARKERS", it should be one of the control types for the "MARKERS" family.

I will try to figure out why this happened.

[jessegreenberg]

I tried -

• Creating a number component with a markers controller.
• Changing the controller type and saving/loading several times.
• Making a copy of the program and saving/loading it.
• Changing the controller family type and saving/loading a few times.

I really don't know how this happened.

For now, I can add a warning if you try to save it in this state.

[jessegreenberg]

I added an error for when this happens so hopefully we can catch it next time.