add WindowCloseAnimation component
WindowManager: add add/close/destroy ports
ActorMove/ActorResize: stop acting on disconnect
GetProperty: handle disconnect
WindowManager: generate disconnections on moveEnd/resizeEnd
add WindowAppearAnimation component
add WindowResize component
WindowCloseAnimation: rework callback
add noflo-core dependency
WindowAppearAnimation: remove logging
WindowManager: emit windows stack
WindowSelector: emit moving/resizing window instead of selected
add WindowFocusManager component
add WidgetAddStyleClass/WidgetRemoveStyleClass components
WindowFocusManager: remove ;