title: How to disable range selection buttons?
body: <p>I am using highstock charts for stock charts. In my charts i have a buttons like 1D,5D, 6M, 3YR, 10YR and YTD.
  When i resize the chart (ipad portrait mode), 3yr,10yr and YTD buttons are coming out of the chart.
  there is no enough room for buttons in chart.So i need to disable few buttons and show only 1D,5D and YTD buttons in chart.</p>
  
  <p>on desktop mode:
  <img src="https://i.stack.imgur.com/dWlhn.png" alt="enter image description here"></p>
  
  <p>On ipad portrait mode:</p>
  
  <p><img src="https://i.stack.imgur.com/4plew.png" alt="enter image description here"></p>
  
  <p>Can you suggest me how to do this?</p>
  
  <p>Thanks in Advance.</p>