Improves shuttle ETA calculation
Fixes shuttles getting stuck if the docking...

...controller they are trying to dock with has been destroyed or is not
responding.
Fixes base shuttle console requiring engine access
Updates secrets panel to use the new shuttle...

...datum correctly.
Fixes ERT shuttle not announcing a cancelled...

...launch if the launch is cancelled after the countdown is completed.
Improves the fix for shuttles being stuck if...

... the docking controller is destroyed.
Fixes macro escape slashes

Derp.
Merge pull request #5372 from mwerezak/emergency-shuttle

More shuttle updates