added preventDefault handler to JQM filterable event

js/libs/jquery-mobile/jquery-mobile.js

@@ -4473,12 +4473,10 @@ $.widget( "mobile.page", {
     },
 
     go: function( steps ) {
-
       //if hashlistening is enabled use native history method
       if ( $.mobile.hashListeningEnabled ) {
         window.history.go( steps );
       } else {
-
         //we are not listening to the hash so handle history internally
         var activeIndex = $.mobile.navigate.history.activeIndex,
           index = activeIndex + parseInt( steps, 10 ),
@@ -13369,7 +13367,9 @@ $.widget( "mobile.filterable", {
       }
 
       this._timer = this._delay( function() {
-        this._trigger( "beforefilter", "beforefilter", { input: search } );
+        if (this._trigger( "beforefilter", "beforefilter", { input: search } ) === false) {
+          return false;
+        };
 
         // Change val as lastval for next execution
         search[ 0 ].setAttribute( "data-" + $.mobile.ns + "lastval", val );