fix(scrollView): cancel scrollTop every time hash is set

Before it, only cancelled scrollTop the first time the hash was set.

Addresses #618

js/ext/angular/src/service/decorators/location.js

@@ -6,19 +6,17 @@ angular.module('ionic.decorator.location', [])
 
 function $LocationDecorator($location, $timeout) {
 
-  var firstHashSet = false;
   $location.__hash = $location.hash;
   //Fix: first time window.location.hash is set, the scrollable area
   //found nearest to body's scrollTop is set to scroll to an element
   //with that ID.
   $location.hash = function(value) {
-    if (!firstHashSet && angular.isDefined(value)) {
+    if (angular.isDefined(value)) {
       $timeout(function() {
         var scroll = document.querySelector('.scroll-content');
         if (scroll)
           scroll.scrollTop = 0;
       }, 0, false);
-      firstHashSet = true;
     }
     return $location.__hash(value);
   };

js/ext/angular/test/service/decorators/location.unit.js

@@ -1,7 +1,7 @@
 describe('$location decorator', function() {
 
   beforeEach(module('ionic.decorator.location'));
-  
+
   describe('.hash()', function() {
 
     it('should find .scroll-content and set scrollTop=0', inject(function($location, $timeout, $rootScope) {
@@ -13,12 +13,6 @@ describe('$location decorator', function() {
       $location.hash('123');
       $timeout.flush();
       expect(scroll.scrollTop).toBe(0);
-
-      //Second time? shouldnt try to set things
-      scroll.scrollTop = 4;
-      $location.hash('456');
-      $timeout.verifyNoPendingTasks();
-      expect(scroll.scrollTop).toBe(4);
     }));
 
   });