Class 'is-selected' doesn't get added to selected options when `multi=true`

[a6hi5h3k]

Upon passing your own method in props for filterOptions to also show selected options in Dropdown for MultiSelect box, the class is-selected doesn't gets added to the option elements.
Following line in buildMenu() looks to be rogue which could be fixed.

var isSelected = this.state.value === op.value;

The value in state is a comma-separted string of values here, which will always fail this check.

[gwyneplaine]

Resolved in 2.x.x

Closing this issue, if for some reason you feel that what I've described above doesn't correctly address your problem, please feel free to create a new issue. Mostly doing this for clarity ad to reduce our issues list down to a sane and relevant number of actionable tasks.