Detect when Offline and display this in the UI

[nelsonic]

At present when we attempt to save (stop) a timer and for what ever reason it does not save to the server/db we are not displaying any info in the UI:

We can do better.

[nelsonic]

This looks like a good way to do it: https://github.com/HubSpot/offline
But we need to write a "loader" to only get the script after a few seconds.