Replace context methods that take a window id with methods on window handles (#2832)

With this PR, I've eliminated almost all references to window ids
outside of the internals of GPUI. All public methods taking these ids
are now defined on `AnyWindowHandle`, which provides a more coherent
narrative around windows as a concept.
54ca5f1d44Nathan Sobo committed on 8/8/2023, 11:51:37 PM· committed by GitHubparentsc96b03a0dc70e6
49 files changedLine totals unavailable