Use pageX instead of clientX

assets/javascripts/views/layout/resizer.coffee

@@ -41,9 +41,9 @@ class app.views.Resizer extends app.View
   onDrag: (event) =>
     return if @lastDrag and @lastDrag > Date.now() - 50
     @lastDrag = Date.now()
-    @resize(event.clientX, false)
+    @resize(event.pageX, false)
     return
 
   onDragEnd: (event) =>
-    @resize(event.clientX or (event.screenX - window.screenX), true)
+    @resize(event.pageX or (event.screenX - window.screenX), true)
     return