markdown-editor: Edit link needs to be visible at the top / in header

[cobordism]

When opening a markdown file with the markdown-editor, the edit link is hidden waaaay at the bottom.
see here for example:
http://swarm-gateways.net/bzz:/markdown-editor.eth/#2d4b1a052b1b32dd0764c17120c769aa932c1a36879207b5247619f711c9d47e

I argue that the edit link should be at the top... Maybe there should even be a header With "New" "Open" "Edit" and "Help" links.

New - opens an empty markdown document
Open - opens a new (swarm-hosted) markdown document
Edit - starts the editor
Help - opens the documentation (another markdown document)

perhaps there could also be an option to open a local markdown file and upload it to swarm?

[cobordism]

@nagydani we could also ping-pong between markdown-editor.eth and and markdown-viewer.eth (or similar)