buttonset does not change input value but changes visual state when selecting text

1. Create a buttonset based on radios

2. Make sure nothing is selected at the moment

3. Select text in one of the buttons using the mouse (in other words make the text blue)

4. Watch the button that the text is on assume a selected visual state

The bug is that when posting the form now no radio is selected. It was visually selected but not in the hidden input.

Version info: jQuery UI - v1.11.4 - 2016-05-13