Cargo - Make player carry/drag item on unload

[LinkIsGrim]

When merged this pull request will:

• Title.

Player will start carrying or dragging item after unloading from cargo if possible. Includes weight checking.

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[PabstMirror]

doesn't work in mp

[PabstMirror]

params ["_unloader", "_object"];
TRACE_2("unloadCarryItem-start",_unloader,_object);

if !(["ace_dragging"] call EFUNC(common,isModLoaded)) exitWith {};

// When unloading attached objects, this code will run before server has finished moving object to the safe position
[{
    params ["_unloader", "_object"];
    (_unloader distance _object) < 10
}, {
    params ["_unloader", "_object"];
    TRACE_2("unloadCarryItem-unloaded",_unloader,_object);
    if ([_unloader, _object] call EFUNC(dragging,canCarry)) exitWith {
        [_unloader, _object] call EFUNC(dragging,startCarry);
    };
    if ([_unloader, _object] call EFUNC(dragging,canDrag)) exitWith {
        [_unloader, _object] call EFUNC(dragging,startDrag);
    };
}, _this, 1.1, { TRACE_1("unloadCarryItem-failed to unload nearby player",_this); }] call CBA_fnc_waitUntilAndExecute;

When unloading a object type in mp the distance check in dragging was failing

ace_cargo_fnc_unloadItem calls QGVAR(serverUnload) and then immeditly calls unloadCarryItem
but it takes a bit for the server to actually move the object down to where the player is

this adds a little delay so all that can happen (only local mp it's 4 frames)
It's possible for this to fail if the unload position is away from the player, but that's just something that can happen and not really an error

also I was worried about collision and physx but it seemed to behave ok
I also switched the nested if statements to the superior exitWith style

[LinkIsGrim]

Don't have access to anything that can (conveniently) commit atm, but works for me. Thanks for testing.