Fixes #56097

When a symbolic column is used while creating a webview panel, instead set the `viewColum` as `undefined` and then resolve it once we know the real (non-symbolic) column

This reverts commit 7b375fcb.

Reapplies 4a38520d with a fix for #66202

Fixes #66202

This reverts commit 4a38520d.

For #33413

Adds the active `SignatureHelp` object (along with the active signature) to the `SignatureHelpContext`.

More manual conversion of index based for loops to for-of loops

Fixes #65733

fix typo for Editor Find, terminalSupport.ts, terminals.ts, extHostDebugService.ts

* Manually added strict null checks in around 70 files

* Fixed tsconfig.strictNullChecks.json merge fail

* Touched up a few unnecessary type changes

* Removed files already in other PRs

Code like:

```
private readonly _onDidEncounterLanguage: Emitter<LanguageId> = new Emitter<LanguageId>();
```

Does not need to repeat the `Emitter<LanguageId>` type annotation

format - extract formatting logic, make it so that we potentially run multiple providers sequentially (off for now)