differentiate notebook moving to new group and splitting

notebooks - wire up onDidChange event from notebook providers, fyi @rebornix,  https://github.com/microsoft/vscode/issues/96403

Fixes #98617

* Make Neo keyboard layout (layer 4) arrow keys work in explorer view

* wrap expressions connected by '&&' in parentheses for clarifiction

Part of #40607

This change removes the `ignorePathCasing` argument from utils like `isEqual` et al. This is replaced with ExtUri-instances that know (or guess) when path casing matters.

For #96503

For #96503

This should enable the revert command on windows

For #96503

Fixes #98768

On remote file systems, webviews can recieve requests for resources with scheme such as:

`vscode-remote://vscode-ssh+localhost/path/to/file`

When the webview resource loading was handled in the renderer, we were able to handle these uris correclty. Now that resource loading happens in the main proccess, we have to normalize them ourselves