TimeRange handling in _plan #254
Description
In its current implementation, the virtualship plan tool will auto determine the TimeRange (in the SpaceTimeRegion) by the waypoint timings if left blank in the space-time region section of the UI. However, there is no logic implemented to auto update the TimeRange if the user returns to the UI at a later time and changes any of their waypoint timings to outside the existing time range.
This will lead to out of bounds errors in virtualship run if left unaddressed as fieldsets are loaded for the wrong time period. Whilst the user can fairly easily fix this themselves before re-running the simulation, it is a bit annoying.
Note this kind of check and automation is already in place for the SpatialRange if the user changes their waypoints outside of the existing range.