This reverts commit 4a44dd50.

Listeners should never mutate these

These events should not be mutated by listeners

Listeners should not be able to mutate these as it will effect what other listeners see

Just use undefined

Split event into multiple

Fixes #81125

Fixes #81434

- Make image preview a ui exension

- Add logic so that `asWebviewUri` supports preserving the scheme of the requested resource. This is important as we know where to load the resource from

See https://bugs.chromium.org/p/chromium/issues/detail?id=978325

This fixes an issue where webviews for custom editors did not have any associated extension information, which caused them try reading `file:` uri resources instead of remote uri resources

Fixes #74955

* working on the left side

* flow direction working

* flow direction

* use menubar visibility to set setting

* hide titlebar on the web

* fix hover feedback