fix(menu): run gestures outside of zone

Closes #755

ionic/components/menu/test/basic/index.ts

@@ -40,6 +40,7 @@ class E2EApp {
   constructor(app: IonicApp) {
     this.app = app;
     this.rootView = Page1;
+    this.changeDectionCount = 0;
 
     this.pages = [
       { title: 'Page 1', component: Page1 },
@@ -62,4 +63,9 @@ class E2EApp {
   onMenuOpening(ev) {
     console.log('onMenuOpening', ev);
   }
+
+  isHidden() {
+    console.log('Change detection', ++this.changeDectionCount);
+    return false;
+  }
 }

ionic/components/menu/test/basic/main.html

@@ -12,7 +12,7 @@
         {{p.title}}
       </button>
 
-      <button ion-item menuClose="leftMenu" detail-none>
+      <button ion-item menuClose="leftMenu" detail-none [hidden]="isHidden()">
         Close Menu
       </button>