Filter out dead keys in tree keyboard navigation

Extract CachedListVirtualDelegate

Fixes #27801: Make the textarea use a proper font size, line height and height to help with the positioning of input pop-ups

Fixes #80741

Fixes debug console stops autoscrolling when a line wraps around

This reverts commit 97b2c927.

Fixes #82938

fixes #30419 and fixes #80649

Fixes #81895

* Fix drag and dropping of editors for webviews

Fixes #25854

This change does the following:

- Have the webview editor create an `EditorDropTarget`. This is required because the webview itself is not part of the normal editor dom (it exists as a top level node in the workbench so that we never reparent it). This means that the standard `EditorDropTarget` does not work.

- Make webviews set `pointer-events: none` while a drag is happening. When a drag happens on Electron's webviews or a normal iframe, no  drag and drop events seem to get generated. The fix is to set `pointer-events: none` while the drag is happening. But it's also difficult to detect when the drag is happening because the  `EditorDropTargets` class eats the drop event itself. The only reliable seeming way I could find to determine when a drag starts and ends is looking at global events on the window.

This workaround is pretty ugly. I'm not sure if there's some better approach that would work with webviews

* Add public `createDropTargets` helper on editorPart

Unfortunatly we can't add this method to IEditorGroupsService as it uses the `HTMLElement` type

* Rename function to createEditorDropTarget

* Use instanceof instead of cast

For https://github.com/microsoft/TypeScript/pull/34552

Fix #78237

Fix #81764

For #82874

add context key for editor area visible
fixes #67707

Fix #79987

Fixes #82825

    Diff: https://github.com/xtermjs/xterm.js/compare/eb25243...6311076

    - Tests
    - Adds scrollSensitivity option for scrolling speed

Add debounce for schema changes to fix slowness when launching with the settings editor persisted open

before the initial render, so we will only render once
when we get the search results.
Also, have to be sure to retrigger search whenever there is a
schema change so extension results show up
Fix #79989