title: Vaadin databinding between ListSelect and java.util.List<String>
body: <p>I am new to vaadin and have a databinding problem. I have posted allready in the vaadin forum, but no answer up to now.
  if you answer here, I will of course reward it anyway.</p>
  
  <p><a href="https://vaadin.com/forum/-/message_boards/view_message/1057226" rel="nofollow">https://vaadin.com/forum/-/message_boards/view_message/1057226</a></p>
  
  <p>thanks in advance.
  greets,
  Andreas</p>
  
  <p>Additional information: I tried allready to iterate over the items in the container, after pressing a save button. After deleting all original elements in the model collection, and adding copies from the container, the GUI breaks. Some other GUI elements do not respond anymore.</p>