Fix harmless error message when using multiple RectangleROI: check if resizer patches are drawn before removing them. Don't display resizers when adding the widget to the figure (widget in unselected state) for consistency with unselected state
Fix harmless error message when using multiple RectangleROI: check if resizer patches are drawn before removing them. Don't display resizers when adding the widget to the figure (widget in unselected state) for consistency with unselected state