Add a friendly explanation to Timed Out workspaces

[shaal]

Is your feature request related to a problem? Please describe

When a workspace is left open in a browser tab but not used for half an hour it gets timed out.
When the user finally returns to that workspace tab, instead of seeing Gitpod's VSCode interface, they get this intimidating screen -

Describe the behaviour you'd like

It would be a great improvement to make this screen friendly.
We can add a message, like:
"Gitpod workspaces get timed out after 30 minutes of no activity.
No worries, everything you worked on was securely saved.
To continue working please click on Open Workspace button".

If it's possible to keep a blurry version of VSCode interface in the background, and add this message on top, it would be even better, because users would be less surprised and more familiar with how the screen looked like the last time they were on.

Describe alternatives you've considered

Additional context

This is somehow related to loading new workspaces, #3738, where the interface should be improved with information about what is happening, what to expect, and how long they might wait (sometimes over a minute)

[gtsiolis]

Thanks @shaal! Agree, adding some help text or even linking to the relevant docs about Timeouts could help.

[haraldreingruber-dedalus]

Would an additional notification for example 5min before the timeout also be an option? It might be useful for pair-programming or mob-programming where roles are switched every 5-30 minutes and it can happen that a workspace owner is only looking at the shared screen of peers for more than 30 minutes.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.