Markdown Editor
Visual markdown editor (TinyMDE) for note textareas
You can enable a visual markdown editor (mde) for note textareas. Under the hood the project TinyMDE - A tiny, dependency-free embeddable HTML/JavaScript Markdown editor is used.

Besides syntax highlighting it ships with an icon bar for common format commands, a help popup and line numbering.

Note: Unfortunately, the on-screen keyboard does NOT work as before with the previous text input field. The selected characters end up as an intermediate step in the small text field below the Markdown editor and then must be copied manually to the desired position.