MediaWiki theme: Improve appearance of CapsuleMultiselectWidget with child
MediaWiki theme: Improve appearance of CapsuleMultiselectWidget with child

Improving appearance of CapsuleMultiselectWidget with child widget,
bringing it closer to MenuSelectWidget appearance.

Bug: T143163
Change-Id: I2d32c9fdb29d1e6209bc596a47fb1ce1e15e048e

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui