Common - Fix Gesture mutex for scroll-wheel reloads

[PabstMirror]

• Starting loadout
  [["SMG_05_F","","acc_pointer_IR","optic_Aco",["30Rnd_9x21_Mag_SMG_02",30],[],""],[],[],[],["V_PlateCarrier1_rgr",[["ACRE_PRC343_ID_1",1],["30Rnd_9x21_Mag_SMG_02_Tracer_Green",1,30],["30Rnd_9x21_Mag_SMG_02_Tracer_Red",1,30]]],[],"","",[],["ItemMap","","ItemRadioAcreFlagged","ItemCompass","ItemWatch",""]]

• Use scrollwheel to reload green tracers

• Point at something with ace_finger or use ace_gesutres

• Ending loadout
  [["SMG_05_F","","acc_pointer_IR","optic_Aco",["30Rnd_9x21_Mag_SMG_02",30],[],""],[],[],[],["V_PlateCarrier1_rgr",[["ACRE_PRC343_ID_1",1],["30Rnd_9x21_Mag_SMG_02_Tracer_Red",1,30]]],[],"","",[],["ItemMap","","ItemRadioAcreFlagged","ItemCompass","ItemWatch",""]]

• reload is interrupted and 30Rnd_9x21_Mag_SMG_02_Tracer_Green magazine has vanished

This uses loadout EH to detect when magazine count drop by 1
It will have false postives for simply dropping ammo on the ground or "pass magazine" action but it will simply block gesutres for a short time, which is far better than losing magazines

Edit: This also supports inventory menu drag-drop reloads

[PabstMirror]

Should also fix #4178

[jonpas]

Hard to look diff, but looks okay I think.