Heal hitpoint after bandage sets bodyPartStatus

[PabstMirror]

GVAR(healHitPointAfterAdvBandage) was only setting the hitpoint, but not changing the bodyPartStatus.
This caused later damage to always redamage the previously healed hitpoints because FUNC(handleDamage_advancedSetDamage) uses bodyPartStatus to set 4 hitpoints when taking new damage.

This changes advanced bandage to clear damage from bodyPartStatus when a hitpoint has been fully healed. It then calls FUNC(handleDamage_advancedSetDamage) to actually reset the damage.

Test case:

[] spawn { 
    [player, 0.8, "leg_r", "bullet"] call ace_medical_fnc_addDamageToUnit; 
    sleep 0.25; 
    [player, "bandage", "leg_r"] call ace_medical_fnc_treatmentAdvanced_bandageLocal; 
    sleep 0.25; 
    [player, 0.2, "body", "bullet"] call ace_medical_fnc_addDamageToUnit; 
};

Would leave the unit limping as the leg damage was healed, but was still on bodyPartStatus so it was reapplied when taking the later body damage.