* Implement select all layers shortcut
* Adjust menu entry for Select All Layers
* Avoid selecting the root of the document when selecting all layers
* Implement deselect all layers
* Fix formatting
* Add extensions.json so VS Code recommends useful extensions
* Add rust-analyzer as the default Rust formatter
* Multi-docs WIP
* Change to number
* Add new document and switch documents
* Remove keybind for previous document. Change keybind for next document.
* Switch documents by clicking tabs
* Remove keybind for previous document. Change keybind for next document.
* multi-docs
* Update package-lock.json
* Hook up File>New to add new document
* Remove console logs and empty lines. Start new documents from 2 instead of 1.
* Fix formatting