Closes: #2517.
Tests:
- Without the patch, run without --develop option and visit a non-exiting page
like /plinth/foo/. It results in '500 internal server error' instead of 404
non-found error.
- With the patch, the '404' page is shown. Breadcrumbs show only a link to the
home page with home icon.
- Accessing a page like /plinth/apps/bepasty/add?foo redirects it to
/plinth/apps/bepasty/add/?foo.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
9ddb83a741