485: When Modal onClickOutside=false Esc key causes failure (#488)

Fix for issue #485 

When Modal onClickOutside=false, pressing the Esc key will cause the
modal to be hidden when the expected behavior is that an Esc key press
would do nothing.

Tests pass and no known issues have arisen.

src/components/Modal/Modal.tsx

@@ -229,7 +229,7 @@ const Modal = forwardRef<ModalApi, ModalProps>(
 
     const escFunction = useCallback(
       (event: KeyboardEvent) => {
-        if (event.code === 'Escape') {
+        if (event.code === 'Escape' && onClickOutside) {
           animateClose(handleEsc, event);
         }
       },