[FR] Clearer indication that a user's session has expired

[bcbernardo]

Hi! I have been experimenting with Guesstimate for a couple weeks, and have found it very useful so far!

Unfortunately, I have lost data a few times in my models as there is no clear warning in the interface once one's session expire and you have to login again. Instead, the user can spend hours working on a model in the public/viewing mode that is activated automatically as soon as the session expires, only to find the next day that none of the modifications persisted in the model.

I see that PR #545 appears to deal with this same issue, but I'm unsure which modifications it brought or even if it has been implemented. However, I just wanted to bring to the developers' attention this usability issue, as I found it really annoying (and even destructive! At least for my models... 😅 ).

Suggestion

Maybe a popup could show when a user is logged out; she would then have to actively close the popup to keep editing the model in view mode (probably not what she wants) or instead to login again - preferably within the same popup...