Restore preventDefault call that shouldn’t have been removed

src/ol/control/fullscreencontrol.js

@@ -83,6 +83,7 @@ ol.control.FullScreen.prototype.handleClick_ = function(browserEvent) {
   if (!goog.dom.fullscreen.isSupported()) {
     return;
   }
+  browserEvent.preventDefault();
   var map = this.getMap();
   if (goog.isNull(map)) {
     return;

src/ol/control/zoomcontrol.js

@@ -94,6 +94,7 @@ goog.inherits(ol.control.Zoom, ol.control.Control);
  * @private
  */
 ol.control.Zoom.prototype.zoomByDelta_ = function(delta, browserEvent) {
+  browserEvent.preventDefault();
   // prevent the anchor from getting appended to the url
   var map = this.getMap();
   // FIXME works for View2D only

src/ol/control/zoomtoextentcontrol.js

@@ -65,6 +65,7 @@ goog.inherits(ol.control.ZoomToExtent, ol.control.Control);
  * @private
  */
 ol.control.ZoomToExtent.prototype.handleZoomToExtent_ = function(browserEvent) {
+  browserEvent.preventDefault();
   // prevent #zoomExtent anchor from getting appended to the url
   var map = this.getMap();
   var view = map.getView();