Fix updatenotifications display, dependencies and csp

apps/updatenotification/css/admin.css

apps/updatenotification/css/admin.scss

apps/updatenotification/js/updatenotification.js

apps/updatenotification/js/updatenotification.js.map

apps/updatenotification/package-lock.json

apps/updatenotification/package.json

apps/updatenotification/src/components/popoverMenu.vue

...tenotification/src/components/popoverMenu/popoverItem.vue

apps/updatenotification/src/components/root.vue

apps/updatenotification/webpack.common.js

apps/updatenotification/webpack.dev.js

core/css/apps.scss