allow controls to live outside the map viewport - with changes to the overview map to handle this (#465)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@2135 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/OverviewMap.js

@@ -147,8 +147,7 @@ OpenLayers.Control.OverviewMap.prototype =
 
         // Optionally add min/max buttons if the control will go in the
         // map viewport.
-        if(!this.div.parentNode  ||
-           (this.div.parentNode.className == 'olMapViewport')) {
+        if(!this.outsideViewport) {
             this.div.className = 'olControlOverviewMapContainer';
             var imgLocation = OpenLayers.Util.getImagesLocation();
             // maximize button div