Don't show WerewolfRobe objects in the inventory

Pretty ugly hard-coding, but this is likely what vanilla does since it
has no option to mark clothes or armor as unplayable like Oblivion does.

apps/openmw/mwgui/inventoryitemmodel.cpp

@@ -75,7 +75,14 @@ void InventoryItemModel::update()
 
     for (MWWorld::ContainerStoreIterator it = store.begin(); it != store.end(); ++it)
     {
-        ItemStack newItem (*it, this, it->getRefData().getCount());
+        MWWorld::Ptr item = *it;
+        // NOTE: Don't show WerewolfRobe objects in the inventory, or allow them to be taken.
+        // Vanilla likely uses a hack like this since there's no other way to prevent it from
+        // being shown or taken.
+        if(item.getCellRef().mRefID == "WerewolfRobe")
+            continue;
+
+        ItemStack newItem (item, this, item.getRefData().getCount());
 
         if (mActor.getTypeName() == typeid(ESM::NPC).name())
         {

apps/openmw/mwgui/inventorywindow.cpp

@@ -356,12 +356,19 @@ namespace MWGui
         if (slot == -1)
             return MWWorld::Ptr();
 
-        MWWorld::Ptr player = mPtr;
-        MWWorld::InventoryStore& invStore = MWWorld::Class::get(player).getInventoryStore(player);
-        if (invStore.getSlot(slot) != invStore.end())
-            return *invStore.getSlot (slot);
-        else
-            return MWWorld::Ptr();
+        MWWorld::InventoryStore& invStore = MWWorld::Class::get(mPtr).getInventoryStore(mPtr);
+        if(invStore.getSlot(slot) != invStore.end())
+        {
+            MWWorld::Ptr item = *invStore.getSlot(slot);
+            // NOTE: Don't allow users to select WerewolfRobe objects in the inventory. Vanilla
+            // likely uses a hack like this since there's no other way to prevent it from being
+            // taken.
+            if(item.getCellRef().mRefID == "WerewolfRobe")
+                return MWWorld::Ptr();
+            return item;
+        }
+
+        return MWWorld::Ptr();
     }
 
     void InventoryWindow::unequipItem(const MWWorld::Ptr& item)