TEIIDDES-627,  TEIIDDES-1601, TEIIDDES-1602 Fixes Save As Issue and Add Source Diagram Toolbar Issues

TEIIDDES-627 File > Save As action results in validation errors in new model if model is virtual and folder location different than original location.

TEIIDDES-1601 Error Setting Extension Properties When Creating Table In A Virtual Model
TEIIDDES-1602 Add Transformation And Union Source Action Diagram Toolbar Buttons Do Not Work

Added a rebuild imports call to the model copy command and that fixed the model save as issues. Fixed some focus selection issues in the diagram toolbar actions.