Feature/fix diagram zoom (#378)

* Revert "set undefined values to null rjsf form data w/ burnettk (#336)"

This reverts commit cca9b147f6.

* Quick test to check if calls are happening correctly to resize the diagram.

* Quick test to check if calls are happening correctly to resize the diagram.

* remove all the logic around fitviewport limitations, which doesn't seem to be requured.  For some reason (modeler as any).constructor.name return '_9' on the dev server, rather than returning 'Modeler', 'Viewer' etal ...

* drop console log

* Clean up comments.

---------

Co-authored-by: Jakub Sokołowski <jakub@status.im>
Co-authored-by: jasquat <jasquat@users.noreply.github.com>
Co-authored-by: burnettk <burnettk@users.noreply.github.com>
Co-authored-by: Madhurya Liyanage <liyanagemadhurya@gmail.com>

spiffworkflow-frontend/src/components/ReactDiagramEditor.tsx

@@ -425,17 +425,7 @@ export default function ReactDiagramEditor({
       }
 
       const canvas = (modeler as any).get('canvas');
-
-      // only get the canvas if the dmn active viewer is actually
-      // a Modeler and not an Editor which is what it will be when we are
-      // actively editing a decision table
-      if ((modeler as any).constructor.name === 'Modeler') {
-        canvas.zoom(FitViewport, 'auto');
-      }
-
-      if ((modeler as any).constructor.name === 'Viewer') {
-        canvas.zoom(FitViewport, 'auto');
-      }
+      canvas.zoom(FitViewport, 'auto');  // Concerned this might bug out somehow.
 
       // highlighting a field
       // Option 3 at: