Navigation corruption when choosing 'visit contract'

Reported in rogueticket-358-closed:

```
Collective GB
Has any
one had this bug when going from navigation map to priority contract after clicking travel and choosing the "visit contract" button ?
Then you cannot click navigation or get to the map and you get that ghosting at the bottom of the screen ?
You can press escape once more to exit. It is as if you are still in the navigation map during the viewing of the contact but then if you go back to navigation, you can't. You must instead press escape twice, then visit the navigation map
```

Reproduce the reported sequence: open the navigation map, choose Travel, select a priority contract, and click “visit contract.” Compare the resulting navigation, map, and escape-key behavior with the expected flow, and confirm that the ghosting does not appear and navigation can be reopened normally.

Written by the indexing model from the issue text.