ve.ui.IconButtonWidget: Extend css transition from 100ms to 200ms
ve.ui.IconButtonWidget: Extend css transition from 100ms to 200ms

Makes make it look nicer.

Change-Id: Ib7c1021a31f607b6e697f16fe797358c0167acee

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