Merged from revision: 6824

Map Editor Fixes/Improvements (by Buggler)
- Better UI feedback after last item deleted from item stack in editor item mode
- Improved editor room number increment code. 'Shift + LMB' when drawing room numbers will reuse same room number on next input
- externalized hardcoded button tooltip text in editor tile selection window 

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@6825 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Editor/EditorItems.cpp

@@ -1169,8 +1169,16 @@ void DeleteSelectedItem()
 						gpCurrItemPoolNode = pIPHead;
 					if( gpCurrItemPoolNode )
 					{
+						//get the item pool at this node's gridno.
 						GetItemPoolFromGround( gpCurrItemPoolNode->sGridNo, &gpItemPool );
 						Assert( gpItemPool );
+
+						MarkMapIndexDirty( gpItemPool->sGridNo );
+						SpecifyItemToEdit( &gWorldItems[ gpItemPool->iItemIndex ].object, gpItemPool->sGridNo );
+						if( gsItemGridNo != -1 )
+						{
+							CenterScreenAtMapIndex( gsItemGridNo );
+						}
 					}
 					//remove node
 					HideItemCursor( sGridNo );