message: fixed setting CollapsableControls default state
diff: @@ -95,6 +95,10 @@ export abstract class CollapsableControls<P extends CollapsableProps = Collapsab
  constructor(props: P, context?: any) {
  super(props, context)
  - this.state = this.defaultState()
  +
  + const state = this.defaultState()
  + if (props.initiallyCollapsed !== undefined) state.isCollapsed = props.initiallyCollapsed
  + if (props.header !== undefined) state.header = props.header
  + this.state = state
  }
  }
  \ No newline at end of file
  