[Feature request] Select/deselect all

[ikreb7]

I know there was already the issue #563. But this is still 5 years ago.

Furthermore, it seems that @select does not work correct. I use the 3.0.0-alpha.2. I know it still an alpha release, but it also doesn't work with version 2.

The problem is that still that the select event also add "Select all" to value. At version 3.0.0-lpha2 I have furthermore the problem, that the @remove event is not triggered.

Reproduction Link

https://jsfiddle.net/ikreb/q7xknv2L/4/

Expected behaviour

Add only the other values except "select all".

Actual behaviour

Add all values.

[takeAction]

it's great if this feature is on.