Removed ability to call cTab_fnc_checkGear with a single item string and changed all such calls to a single item array. This is done as an improvement as the previous "clever" way was adding extra calculations to every call of cTab_fnc_checkGear.
When switching to full-screen mode on a UAV, spawn a loop that will check if the UAV feed has been switched away from and then set `cTabUavViewActive` to `false`. This is a fix for #58.
Have implemented the same for helmet cams, in case there is a way to switch away from the full-screen feed without pressing `IF_MAIN`.
Only add UAVs with a crew to list of UAVs on cTab tablet. Fixes #61.