compat js findPosX/y more closely mimic historical function

lib/scripts/compatibility.js

@@ -165,13 +165,13 @@ toggleWrap = DEPRECATED_WRAP(dw_editor.toggleWrap);
 setWrap = DEPRECATED_WRAP(dw_editor.setWrap);
 
 function findPosX(object){
-    DEPRECATED('Use jQuery.position() instead');
-    return jQuery(object).position().left;
+    DEPRECATED('Use jQuery.offset() instead');
+    return jQuery(object).offset().left;
 }
 
 function findPosY(object){
-    DEPRECATED('Use jQuery.position() instead');
-    return jQuery(object).position().top;
+    DEPRECATED('Use jQuery.offset() instead');
+    return jQuery(object).offset().top;
 }
 
 function getElementsByClass(searchClass,node,tag){