Overhaul Vehicle Gear

[Freddo3000]

When merged this PR will:

• Fix #419
• Converts data to be stored in hashmap, bringing down filesize (~5kb per vehicle with moderate load), backwards compatibility preserved
• Adds columns for addon icons and item type
• Adds filter showing all items added, including those no longer part of the faction
• Add UI for changing sorting order using BIS_fnc_initListNBoxSorting. Sorts by item type by default
• Improve data caching
• Disable storing faction/category when there are no items added (Reduces filesize)
• Add a bunch of logging/traces
• Replace grenade icon with binocular, should better describe the the items (utility)