title: Can not find Visual Studio GTK GUI designer/source button
body: <p>I can not find these two buttons. How to reactive those buttons? Thanks</p>
  
  <p><strong>The buttons shows in red circle</strong>
  <a href="https://i.stack.imgur.com/47T8Z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/47T8Z.png" alt=""></a></p>
  
  <p><strong>Current Snapshot:</strong>
  <a href="https://i.stack.imgur.com/k265F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/k265F.png" alt=""></a></p>