Make orbital analysis window available in tracking station

[DarthPointer]

[Description by @eggrobin, this issue originally had none]
The orbit analyser is currently only available in map view.

We should make it available for the PredictedVessel, i.e., the selected vessel in the tracking station, and the active vessel in map view.

[DarthPointer]

Improved level: add abillity to analysis of a user-defined orbit. For example, I wish to know which orbit to choose for a retranslator - I input desired "initial" orbit data and see if it is any stable before I launch the vessel.

[eggrobin]

Improved level: add abillity to analysis of a user-defined orbit. For example, I wish to know which orbit to choose for a retranslator - I input desired "initial" orbit data and see if it is any stable before I launch the vessel.

One issue at a time. This issue is about making the orbit analyser available in the tracking station, not about every imaginable orbit analysis-related improvement.

This suggestion, much like, e.g., the idea of planning prior to launch, would require a complete rework of the UI and major changes to the underlying data model to describe trajectories without starting from the trajectory of a pre-existing vessel.