Mosh restore stucked until returning to tab

In certain cases, Mosh won't restore the session after a few hours and it requires to move between tabs to trigger the restore.

Make sure in the new version, the Payloads trigger this at the proper time.

Start by reproducing the Mosh restore problem after the session has been idle for several hours, then inspect the Payloads timing mentioned in the issue and how tab changes trigger restoration. Done means the session restores at the proper time without requiring the user to switch tabs.

Written by the indexing model from the issue text.