avoid re-select inside selectionChange callback

debian/changelog.Debian

@@ -3,6 +3,8 @@ pve-manager (3.1-25) unstable; urgency=low
   * delay UNAUTHORIZED response to avoid DOS attac
   
   * fix typo in pve cron script
+  
+  * backup GUI: fix VMID selection bug
 
  -- Proxmox Support Team <support@proxmox.com>  Mon, 18 Nov 2013 11:20:37 +0100
 

www/manager/dc/Backup.js

@@ -47,7 +47,9 @@ Ext.define('PVE.dc.BackupEdit', {
 			    sel.push(record.data.vmid);
 			});
 
+			insideUpdate = true;
 			vmidField.setValue(sel);
+			insideUpdate = false;
 		    }
 		}
 	    }