add fixes/navaids to plan from longpressed/rubberbanding

[pasniak]

1. long press does not detect long pressing on navaids/fixes; it only handles airports ("LongTouchDestination") which can be added with +Plan
2. rubberbanding does not snap to navaids/fixes: replaceDestination handles only airports

which is a bit counter-intuitive as it is indeed possible to add navaids to a plan when creating Plan from list of identifiers or from Find (long pressing, then +Plan)

[pasniak]

1. is fixed in Allow long-pressing on VOR Locations #259 which requires work (rebase?) to resolve the diffs