Please add »source mode« for markdown editing

[benjamindahl]

Would be nice to be able to switch to a »source code mode« for more precise markdown editing. (like in Typora or in MarkText)

Thanks
Benny

[benjamindahl]

One particular reason would be to change the path for attachments.
Another one would be to correct the wrong auto-formatted parts of the source.

[perennoe]

or; if one wouldn't want to have pseudo-wysiwyg vs. a source-view:
one could also include an option to display markdown-syntax while also interpreting it. like zettlr does.

though, just switching of the interpreter might be easier?