dont show orange revoke tokens button if there are no revokable tokens
dont show orange revoke tokens button if there are no revokable tokens

fix for https://github.com/mozilla/build-relengapi/issues/198
hwine/build-relengapi,srfraser/services,andrei987/services,hwine/build-relengapi,srfraser/services,mozilla/build-relengapi,mozilla-releng/services,mozilla-releng/services,andrei987/services,garbas/mozilla-releng-services,La0/mozilla-relengapi,lundjordan/services,La0/mozilla-relengapi,Callek/build-relengapi,djmitche/build-relengapi,andrei987/services,hwine/build-relengapi,djmitche/build-relengapi,garbas/mozilla-releng-services,lundjordan/build-relengapi,mozilla/build-relengapi,mozilla/build-relengapi,lundjordan/services,La0/mozilla-relengapi,srfraser/services,lundjordan/services,Callek/build-relengapi,garbas/mozilla-releng-services,hwine/build-relengapi,Callek/build-relengapi,djmitche/build-relengapi,mozilla-releng/services,La0/mozilla-relengapi,lundjordan/build-relengapi,djmitche/build-relengapi,lundjordan/services,lundjordan/build-relengapi,garbas/mozilla-releng-services,lundjordan/build-relengapi,srfraser/services,mozilla-releng/services,mozilla/build-relengapi,Callek/build-relengapi,andrei987/services