This reverts commit f1ada7a.

Fixes panic when using lazy widgets

feat: various improvements to window commands and event handling

…hey have been handled in the event loop

feat: sent output events

* sctk: Don't send output events twice

With these lines, a subscription seems to receive output events twice.
Without it, only once as expected.

* sctk: Make `IcedOutput::Output` take a `WlOutput`

This is the most flexible solution, and using output events, it is
possible to create surfaces for specific outputs or all.

Matching by make/model is a bad idea anyway. Matching by name may be
appropriate.

…tion

…aces, and also adds the option for starting with no initial surface

For some reason this was an issue testing with `iced_glow`/`glutin`, but
this also fixes the issue I was having where the application doesn't get
output events if I destroy the initial surface and create surfaces
later.

This provides a `Compositor` adapting a `GLCompositor`, that thus can be
used with `iced_winit` or with a different shell.

Backport of iced-rs#1688. Still needs some
work.

Fixes behavior with `InitialSurface::None`.