#### New documentation panel:
- Shows documentation of currently-entered method.
- Open/close with Ctrl+D or the extended menu.
- Renders markdown; supports WYSIWYG editing.
- Formatting can be added by typing the same markdown special characters that will appear in the source code, e.g.:
- `# Heading`
- `## Subheading`
- `*emphasis*`
- Panel left edge can be dragged to resize similarly to visualization container.
https://github.com/enso-org/enso/assets/1047859/6feb5d23-1525-48f7-933e-c9371312decf
#### Node comments are now markdown:
#### Top bar extended menu improvements:
- Now closes after any menu action except +/- buttons, and on defocus/Esc.
- Editor/doc-panel buttons now colored to indicate whether editor/panel is open.
https://github.com/enso-org/enso/assets/1047859/345af322-c1a8-4717-8ffc-a5c919494fedCloses#9786.
# Important Notes
New APIs:
- `DocumentationEditor` component: Lazily-loads and instantiates the implementation component (`MilkdownEditor`).
- `AstDocumentation` component: Connects a `DocumentationEditor` to the documentation of an `Ast` node.
- `ResizeHandles` component: Supports reuse of the resize handles used by the visualization container.
- `graphStore.undoManager`: Facade for the Y.UndoManager in the project store.
