Partially implement share with group option for object inventory items

If serverside permissions are off then this works as expected.  Previously, it was impossible for more than one person to edit such items even if permissions were off.
If serverside permissions are on then this works as expected if the object was created by an avatar who had the required group active.
However, if the group for the object is later set then the contained item is still not editable.  This may be linked to a wider bug where the object is still not modifiable by the group anyway

OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs

@@ -670,7 +670,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             AsyncPacketProcess packetObject = (AsyncPacketProcess)state;
             packetObject.result = packetObject.Method(packetObject.ClientView, packetObject.Pack);          
-            
         }
 
         #endregion Packet Handling
@@ -7683,12 +7682,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                         newTaskItem.GroupPermissions = updatetask.InventoryData.GroupMask;
                         newTaskItem.EveryonePermissions = updatetask.InventoryData.EveryoneMask;
                         newTaskItem.NextPermissions = updatetask.InventoryData.NextOwnerMask;
+
+                        // Unused?  Clicking share with group sets GroupPermissions instead, so perhaps this is something
+                        // different
                         //newTaskItem.GroupOwned=updatetask.InventoryData.GroupOwned;
                         newTaskItem.Type = updatetask.InventoryData.Type;
                         newTaskItem.InvType = updatetask.InventoryData.InvType;
                         newTaskItem.Flags = updatetask.InventoryData.Flags;
                         //newTaskItem.SaleType=updatetask.InventoryData.SaleType;
-                        //newTaskItem.SalePrice=updatetask.InventoryData.SalePrice;;
+                        //newTaskItem.SalePrice=updatetask.InventoryData.SalePrice;
                         newTaskItem.Name = Util.FieldToString(updatetask.InventoryData.Name);
                         newTaskItem.Description = Util.FieldToString(updatetask.InventoryData.Description);
                         newTaskItem.CreationDate = (uint)updatetask.InventoryData.CreationDate;
@@ -11615,6 +11617,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             public PacketMethod method;
             public bool Async;
         }
+        
         public class AsyncPacketProcess
         {
             public bool result = false;

OpenSim/Region/Framework/Scenes/Scene.Inventory.cs

@@ -1160,6 +1160,7 @@ namespace OpenSim.Region.Framework.Scenes
                             item = LibraryService.LibraryRootFolder.FindItem(itemID);
                         }
 
+                        // If we've found the item in the user's inventory or in the library
                         if (item != null)
                         {
                             part.ParentGroup.AddInventoryItem(remoteClient, primLocalID, item, copyID);

OpenSim/Region/Framework/Scenes/SceneObjectGroup.Inventory.cs

@@ -173,7 +173,9 @@ namespace OpenSim.Region.Framework.Scenes
                             item.NextPermissions;
                     taskItem.NextPermissions = item.NextPermissions;
                     taskItem.CurrentPermissions |= 8;
-                } else {
+                } 
+                else 
+                {
                     taskItem.BasePermissions = item.BasePermissions;
                     taskItem.CurrentPermissions = item.CurrentPermissions;
                     taskItem.CurrentPermissions |= 8;

OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs

@@ -527,6 +527,7 @@ namespace OpenSim.Region.Framework.Scenes
             item.ParentID = m_part.UUID;
             item.ParentPartID = m_part.UUID;
             item.Name = name;
+            item.GroupID = m_part.GroupID;
 
             lock (m_items)
             {
@@ -619,6 +620,12 @@ namespace OpenSim.Region.Framework.Scenes
                     item.ParentID = m_part.UUID;
                     item.ParentPartID = m_part.UUID;
                     item.Flags = m_items[item.ItemID].Flags;
+
+                    // If group permissions have been set on, check that the groupID is up to date in case it has
+                    // changed since permissions were last set.
+                    if (item.GroupPermissions != (uint)PermissionMask.None)
+                        item.GroupID = m_part.GroupID;
+                    
                     if (item.AssetID == UUID.Zero)
                     {
                         item.AssetID = m_items[item.ItemID].AssetID;
@@ -770,6 +777,7 @@ namespace OpenSim.Region.Framework.Scenes
                     uint everyoneMask = 0;
                     uint baseMask = item.BasePermissions;
                     uint ownerMask = item.CurrentPermissions;
+                    uint groupMask = item.GroupPermissions;
 
                     invString.AddItemStart();
                     invString.AddNameValueLine("item_id", item.ItemID.ToString());
@@ -779,7 +787,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                     invString.AddNameValueLine("base_mask", Utils.UIntToHexString(baseMask));
                     invString.AddNameValueLine("owner_mask", Utils.UIntToHexString(ownerMask));
-                    invString.AddNameValueLine("group_mask", Utils.UIntToHexString(0));
+                    invString.AddNameValueLine("group_mask", Utils.UIntToHexString(groupMask));
                     invString.AddNameValueLine("everyone_mask", Utils.UIntToHexString(everyoneMask));
                     invString.AddNameValueLine("next_owner_mask", Utils.UIntToHexString(item.NextPermissions));