IE sometimes still insert at the beginning

[alfonsoml]

Despite the previous fixes for the 2.6.4 milestone, in the current SVN there are still some situations where IE can insert the new content at the beggining. One example is using the easyupload file dialog:  http://martinezdelizarrondo.com/easyupload

For the moment this is the best option that I've found:

fckdialog.html

@@ -697 +697 @@
 
                 if ( frmMain.Ok && frmMain.Ok() )
                         CloseDialog() ;
-                else
-                        frmMain.focus() ;
         } ;
 
         window.Cancel = function( dontFireChange )

[alfonsoml]

The problem is related to #2376, disabling the automatic save of selection also fixes the problem, so I've tested another approach that seems to work well: while a dialog is active, ignore any further automatic saving of the selection.

The fact is that debugging the calls to FCKSelection.Save, it can be seen that it's called three times whenever a dialog opens, and we just need one, any change of the selection while the dialog is open is an undesired one and should be ignored, so I added a variable to lock the stored selection.

[alfonsoml]

Proposed patch

[alfonsoml]

Fixed with [2613]