fix: restore scroll position after fialog closes (#1397)

Co-authored-by: deno <[email protected]>

Author: wchrapka

.gitignore

@@ -27,3 +27,5 @@ storybook-static
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+
+.idea

src/Dialog/Dialog.js

@@ -105,6 +105,7 @@ class Dialog extends Component {
         return ReactDOM.createPortal(
             <FocusLock as='div' className={backdropClassName}
                 lockProps={{ ...rest }}
+                returnFocus
                 whiteList={allowListForLockFocus}>
                 <span data-autofocus tabIndex='-1' />
                 <div