Issues with grenades

[kassibuss]

(Not sure if the first one is intentional but)

• Detpacks do not explode instantly when triggering
• Assaults and Supports get three of their respective grenades
• The viewmodels for the grenades do not disappear after you have exhausted the ammo
• You cannot pick up utility from a different class

[kassibuss]

Second issue possibly fixed with PR #85