title: Change selected text in Sketchware
body: <p>How can I change selected text in edittext on Sketchware by clicking button. Anyone please help me...</p>
  <p>I am try to only change selected text in edittext. But in settext option, it change all the text of a edittext. I want to change the selected text only.</p>
  <p>I expecting that, When I click button then selected text of edittext are change but other text in same edittext are don't change.</p>