fix(scrollView): on desktop, mousewheel only scrolls the right scrollView

Closes #1376

js/angular/directive/content.js

@@ -47,7 +47,7 @@ function($timeout, $controller, $ionicBind) {
     compile: function(element, attr) {
       var innerElement;
 
-      element.addClass('scroll-content');
+      element.addClass('scroll-content ionic-scroll');
 
       if (attr.scroll != 'false') {
         //We cannot use normal transclude here because it breaks element.data()

js/angular/directive/scroll.js

@@ -31,7 +31,7 @@ function($timeout, $controller, $ionicBind) {
     scope: true,
     controller: function() {},
     compile: function(element, attr) {
-      element.addClass('scroll-view');
+      element.addClass('scroll-view ionic-scroll');
 
       //We cannot transclude here because it breaks element.data() inheritance on compile
       var innerElement = jqLite('<div class="scroll"></div>');

js/utils/dom.js

@@ -250,17 +250,6 @@
       return null;
     },
 
-    elementHasParent: function(element, parent) {
-      var current = element;
-      while (current) {
-        if (current.parentNode === parent) {
-          return true;
-        }
-        current = current.parentNode;
-      }
-      return false;
-    },
-
     /**
      * @ngdoc method
      * @name ionic.DomUtil#rectContains

js/views/scrollView.js

@@ -838,12 +838,15 @@ ionic.views.Scroll = ionic.views.View.inherit({
       };
 
       self.mouseWheel = ionic.animationFrameThrottle(function(e) {
-        if (ionic.DomUtil.elementHasParent(e.target, self.__container)) {
+        var scrollParent = ionic.DomUtil.getParentOrSelfWithClass(e.target, 'ionic-scroll');
+        if (scrollParent === self.__container) {
+
           self.hintResize();
           self.scrollBy(
             e.wheelDeltaX/self.options.wheelDampen, 
             -e.wheelDeltaY/self.options.wheelDampen
           );
+
           self.__fadeScrollbars('in');
           clearTimeout(self.__wheelHideBarTimeout);
           self.__wheelHideBarTimeout = setTimeout(function() {