GeoscapeClockOptions
Tracking Issue: #1578
Provide easily adjustable options for display of the Geoscape time by modders, to make the time display more intuitive when the skyranger is flying (in this case, options are: 1. The timezone is only updated when the avenger lands, 2. The timezone is updated only when the skyranger takes off, 3. Display UTC at all times and display the timezone difference on the clock UI.