* move `nullable` handling to `onChange` of `Combobox.Input` itself
We were specifically handling backspace/delete keys to verify if the
`Combobox.Input` becomes empty then we can clear the value if we are in
single value and in nullable mode.
However, this doesn't capture other ways of clearing the
`Combobox.Input`, for example when use `cmd+x` or `ctrl+y` in the input.
Moving the logic, gives us some of these cases for free.
* ensure pressing `escape` also clears the input in nullable, single value mode without an active value
* adjust test to ensure we don't have a selected option instead of an active option
We still will have an active option (because we default to the first
option if nothing is active while the combobox is open). But since we
cleared the value when using the `nullable` prop, then it means the
`selected` option should be cleared.
* ensure `input` event is fired when firing keydown events
* ensure `defaultToFirstOption` is always set when going to an option
We recently made a Vue improvement that delayed the going to an option,
but this also included a bug where the `defaultToFirstOption` was not
set at the right time anymore.
* update changelog
* fix `than` / `then` typo
Robin Malfait
88b068cff1