In `0.22.0`, `eframe::start_web` has been replaced with `eframe::WebRunner`, which also installs a nice panic hook (no need for `console_error_panic_hook`).
A window may not always be available and may have already been closed by the time an eframe app is closing. An example of this is Android, where the main activity window may have been stopped or discarded because the app is no longer in the foreground, and then the user decides to close your app without resuming it using the multitasking view.
In this case, skip the window persistence step if it does not exist anymore by the time we are saving the persistence data. Currently eframe will panic with `winit window doesn't exist` instead.
Some refactoring now processing viewports_commands is in egui_winit::process_viewport_commands
And creating new windows and cleaning is in GlowWinitApp::process_viewport_builders
Context::current_rendering_viewport was replaced by Context::get_viewport_id
Added Context::get_parent_viewport_id
Changed Context::run to need parent_viewport_id
Changed Context::beagin to need parent_viewport_id
Added ImplContext::frame_stack
Some work on making posibile to render multiples frames at the same time
A lot of more things in glutin backend is not Arc<RwLock<T>>
Now on Context.create_viewport in the render function will we have viewport_id and parent_viewport_id
New problem if a windows is fucused and we interact with other window the first event will be send to the last window that was focused
Now the Viewport render function is passed to the backend
I was needed to update the demo because now Window::show() needs a Fn before was a FnOnce
I changed from FnOnce to Fn because we want the window to be rendered separately from the main window
That means now the variabiles that we are moving to window need to be Rc or Arc!
This is making harder to use `Window`!
I'am waiting for more ideas!
In eframe now any Window has a property render that stores the current window render function, if has not function App::update will be called insted!
New problems in any other window excluding the main window we have no mouse input, i don't know why!
Now every window has embedded to false by default, for testing purposes!
