[x] Adds an update notice when the app is outdated.
Test Plan
Simply load the App to see the message (I've created a faux release tagged 0.1.1 that is newer than the current version on version.js - I'll delete the release once this is merged).
You should be able to dismiss it.
Clicking on the message takes you to the release page.
This PR:
Test Plan
Simply load the App to see the message (I've created a faux release tagged 0.1.1 that is newer than the current version on version.js - I'll delete the release once this is merged).