selection-list fires on-change when clicking on existing selection in single select mode

[hipitihop]

When the selection-list is configured for single selection, if you click on the item which is already selected, the :on-change fires each time you click, even thought the :model is not changing. In the example below, if you click on item 1, the on-change fires.

[superstructor]

Fixed in 5a9dd396e898ce1535fd2164cd7b6f18a79dd95e