User system command functions: Ability to set individual timeouts

[iwconfig]

Is your feature request related to a problem? Please describe. I'm using zenity --calendar to pick dates and if I'm to slow picking a date the timeout triggers and the date I pick is not returned. It works fine if I disable or increase the timeout but then this affects other user system command functions.

Describe the solution you'd like The ability to set individual timeouts for each command. Maybe keep a global timeout but add the option for prioritized local timeouts as well.