Fixed: Guest Book Element's delete button did not work when page was …

…an instance (e.g. target of menu)

DOC_INST URL query element got lost...

webyep-system/programm/elements/WYGuestbookElement.php

@@ -227,7 +227,7 @@ function sDisplay()
             $dEditorQuery = $this->dEditorQuery;
             $dEditorQuery[WY_QK_GB_ID] = $iID;
 				$goApp->setActionInQuery($dEditorQuery, WY_QV_GB_REMOVE);
-				$oURL->setQuery($dEditorQuery);
+				$oURL->setQuery(array_merge($oURL->dQuery, $dEditorQuery));
 				$oLink = new WYLink($oURL, WYTS("GuestbookRemoveButton"));
 				$oImgURL->addComponent("remove-button.gif");
 				$oImg = new WYImage($oImgURL);