Adds a search function to the in-game store. Pressing the F key (configurable) when the store menu is open will display a search dialog. The search function supports the following fields - Equipment name (e.g. 'Vario') - Brand name (e.g. 'Massey') - Mod name (e.g. 'Allis') - Mod author (e.g. 'Giants') CHANGELOG: v1.1.0: - FIX: Fixed the incompatabillity with Garage Menu mod [#5] - FIX: Search is now properly disabled on sales and the 'other' store categories [#4] - NEW: Added UI button to search