title: Google Map event bounds_changed triggered multiple times when dragging
body: <p>I have a google map with markers. I want my markers to be refreshed when the map is moved/zoomed...</p>
  
  <p>Google recommend to use the event <code>bounds_changed</code> for that, but when I move the map, <strong>the event is triggered for each pixel that I move the map</strong>. I want the map to be refreshed only when the user stopped moving the map, i.e. when he released the mouse button after dragging.</p>
  
  <p>How can I do that ?</p>