Add editApp to $editcontext in the Form Calculation and Constraint Arcade Profiles

[JustinReynolds]

This is similar to $editcontext.editType.

Add editApp property to the $editcontext property for the Form Calculation and Constraint Arcade Profiles (e.g. $editcontext.editApp).  It would return values such as "Field Maps" or "Map Viewer".   I could write it to an attribute in my schema to store this value or use it to inform other actions.

Generally, I might want to know in which app  was used for the last edit (written to an attribute) or which app is being used for the current edit.