removeSelectedItem doesn't work as expected

[javier-godoy]

Expected behavior:

• There are two items: Mars and Venus
• Calling removeSelectedItem actually removes the item Venus.

  add(new Button("No Venus", ev -> {
  chf.removeSelectedItem(venus);
  }));

  

Observed behavior:

• The Venus is not removed after calling removeSelectedItem
• After removing Mars, a new chip appears with label "1"
• When retrieving the value it correctly shows Mars.

[javier-godoy]

This is likely related to #25