gridview: propagate top, left in layout

related to #84315

Improve Monokai theme for markdown files

Allow trailing commas in jsconfig.json, too

For #83961

This keeps hr's full-width (because otherwise they look very strange)

Fixes #84826

For #85430

Fixes #85429

* Fixes more node 12 typing errors

For #82514

* Remove Symbol.toStringTag usage for now

* Reverting a few fixes that are not comptible with current node typings

* Revert one more use of StringDecoder

Must wait until we actually pick up the new typings

Command and Keybinding for adding multi cursor from search result

Fix #85106

If multiple instances of the same  custom editor are opened for the same resource, the edit stack should be shared between them. This matches how we work with text files

This reverts commit 5f27d2a9.