* web-sys: Impl. event listeners removal for canvas
* web-sys: Impl. media query listeners cleanup
* web: Emit WindowEvent::Destroyed after Window is dropped
* web-sys: Fix unload event closure being dropped early
* web: Impl. cleanup on ControlFlow::Exit
- Drops the Runner, which causes the event handler closure to be
dropped.
- (web-sys only:) Remove event listeners from DOM.
* web: Do not remove canvas from DOM when dropping Window
The canvas was inserted by the user, so it should be up to the user
whether the canvas should be removed.
* Update changelog
