#34 Add aircraft search box

[Reinier Olislagers]

When you use fgrun with e.g. git fgdata, there's a huge amount of planes to choose from. It would help to have a search box above the current Recently used aircraft list that searches for aircraft name and
1. selects the aircraft in question if found in the aircraft or
2. filters the aircraft list (entering an empty name in the search box should remove the filter)

I'd prefer option 2, but either is fine or any other way to quickly select the aircraft you want.