-fixed a typo in fabricableItem requirement & added checking for said typos

- fixed being able to set battery recharge sped over the limits
- fixed vents being added to OxygenGenerator.ventlist multiple times
- fixed item.Submarine not being set if pulling an item from a fabricator
- some tutorial fixes
- fixed TraitorMode endmessage not being shown if the sub isn't at the end and neither character is dead
- SalvageQuest fails if the item has been destroyed
-

Subsurface/Source/Items/Item.cs

@@ -203,6 +203,12 @@ namespace Barotrauma
             get { return prefab.ConfigFile; }
         }
 
+        public bool Removed
+        {
+            get;
+            private set;
+        }
+
         //which type of inventory slots (head, torso, any, etc) the item can be placed in
         public List<LimbSlot> AllowedSlots
         {
@@ -1504,6 +1510,8 @@ namespace Barotrauma
         {
             base.Remove();
 
+            Removed = true;
+
             //sprite.Remove();
             //if (body != null) body.Remove();