message: Adding close button to Support menu
diff: import { HelpIcon, useApp } from '@backstage/core-api';
  import {
  + Box,
  Button,
  List,
  ListItem,
  @@ -127,6 +128,11 @@ export const SupportButton = ({ children }: PropsWithChildren<Props>) => {
  {items &&
  items.map((item, i) => <SupportListItem item={item} key={i} />)}
  </List>
  + <Box display="flex" justifyContent="flex-end">
  + <Button color="primary" onClick={popoverCloseHandler}>
  + Close
  + </Button>
  + </Box>
  </Popover>
  </Fragment>
  );
  