title: Nativescript scroll doesn't work with stackLayout
body: <p>I'm trying to learn nativescript and found 2 seperate projects and trying to combine them but when I do that scroll doesn't work can you explain why or what I'm doing wrong.</p>
  
  <p><strong>Here is my code</strong></p>
  
  <pre><code>&lt;ActionBar title="myApp" class="action-bar"&gt;
  &lt;/ActionBar&gt;
  
  
    &lt;GridLayout class="page" orientation="vertical"&gt;
  
      &lt;ListView [items]="items" class="list-group"&gt;
          &lt;ng-template let-item="item"&gt;
              &lt;Label [nsRouterLink]="['/item', item.id]" [text]="item.name" 
        class="list-group-item"&gt;&lt;/Label&gt;
          &lt;/ng-template&gt;
      &lt;/ListView&gt;
  
  &lt;/GridLayout&gt;
  &lt;TabView #tabview [selectedIndex]="tabindex" class="tab-view" 
   selectedColor="#4099FF" &gt;
  
   &lt;StackLayout align="top" *tabItem="{title:'Home',iconSource:'res://home'}"&gt;
      &lt;home-tab&gt;&lt;/home-tab&gt;
    &lt;/StackLayout&gt;
    &lt;StackLayout *tabItem="{title: 'Explore', iconSource:'res://explore'}"&gt;
      &lt;Label class="border" borderWidth="5" borderColor="black" text="hey"&gt;
  &lt;/Label&gt;
  &lt;/StackLayout&gt;
  &lt;StackLayout *tabItem="{title: 'Notifications', 
  iconSource:'res://notifications'}"&gt;
     &lt;/StackLayout&gt;
  
  
  &lt;/TabView&gt;
  </code></pre>
  
  <p>Here at top I have tabs and under that I have list of items but can't scroll down it doesn't work</p>