Allow deselection of a tag when singleItem is true

[Akiat]

Another feature request, but not urgent :)

I have a situation where it could be great to be able to deselect the tag (to have no tag selected) when the singleItem parameter is true.

Have a great day.

[Akiat]

I'm using the submitted modification since I submitted the PR without any problem. I think it should be great to merge this PR 👍

[ririlya94]

What should i do, if i want to set only the first item is selected for the singleItem = true? for the first time init