Added code to raise an error if trying to paste a step in reference to a step that has been deleted by another user (eg: paste before, paste after or paste replace)

Added handlers for new treeview events of NodeCopy and ClipboardStatus
Added exception handlers to handle the exception of trying to use a deleted step as a reference point for a paste operation (before, after or replace)
Added code to set the MyCopyStep property to the value of the new step added in a paste replace operation

PROMS/DataLoader/PROMSFixes.Sql

@@ -53,6 +53,11 @@ BEGIN TRY -- Try Block
 			ContentID INT
 		)
 		
+	if exists (select * from tblitems where itemid = @ItemID and DeleteStatus !=0)
+		BEGIN
+			RAISERROR ('###Cannot Paste Step###This current step has been deleted in another session',16,1)
+			RETURN
+		END
 		-- First check if the replaced item can be deleted, i.e. it doesn't have transitions
 		-- pointing to it or children.
 
@@ -419,6 +424,11 @@ WITH EXECUTE AS OWNER
 AS
 BEGIN TRY -- Try Block
 	BEGIN TRANSACTION
+	if exists (select * from tblitems where itemid = @ItemID and DeleteStatus !=0)
+		BEGIN
+			RAISERROR ('###Cannot Paste Step###This current step has been deleted in another session',16,1)
+			RETURN
+		END
 	-- First make a copy of the input StartItemID
 	-- DestFormatID is the formatid for the destination parent's format
 	DECLARE @DestFormatID int
@@ -526,6 +536,11 @@ WITH EXECUTE AS OWNER
 AS
 BEGIN TRY -- Try Block
 	BEGIN TRANSACTION
+	if exists (select * from tblitems where itemid = @ItemID and DeleteStatus !=0)
+		BEGIN
+			RAISERROR ('###Cannot Paste Step###This current step has been deleted in another session',16,1)
+			RETURN
+		END
 	-- First make a copy of the input CopyStartID
 	-- DestFormatID is the formatid for the destination parent's format
 	DECLARE @DestFormatID int