The employee vacation plane icon now appears based on the user's actual status, helping colleagues quickly see when someone is away. This fixes inconsistent display of leave status in messaging and user presence areas.

task-2377882

This fix prevents a mail conversation from appearing to load endlessly when fetching messages fails. Users get a clearer, more stable experience instead of being blocked by a failed message refresh.

task-2377440

This fix prevents an error from appearing when users save or discard changes in the Point of Sale settings form. It adds a safer check for unexpected data so the configuration screen behaves reliably.

Adjustment of a previous commit b1dff85a85dc1819c029b564dbb87871c2f5e7ea
 It is possible for the argument to be something else than `undefined` or an array. We're adding a check to prevent an error to occur in that case.