Make popup text selectable in Firefox. (Closes #1129)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@6176 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -732,6 +732,7 @@ OpenLayers.Map = OpenLayers.Class({
             }
         }    
         
+        layer.div.className = "olLayerDiv";
         layer.div.style.overflow = "";
         this.setLayerZIndex(layer, this.layers.length);
 

theme/default/style.css

@@ -1,4 +1,4 @@
-div.olMapViewport {
+div.olLayerDiv {
    -moz-user-select: none 
 }