invalid search results after applying country filter

[Дмитрий Бражников]

Steps to reproduce:

1. Open main activity with list of the planes

2. Search by country "belgium" - empty list displayed

3. Search by "all countries" - empty list displayed

4. Search by "ussr" - empty list displayed

[Дмитрий Бражников]

Same behaviour for other filters (by manufacturer, by type)

[Дмитрий Бражников]

valid only for category "Самолёты" in side menu

[Alexey Nevinsky]

Fixed