This change contains React conversions for the the status report viewer

(which just renders a submitted status report) and the status report

editor (which is the big one).
As part of this, I'm moving away from EpicEditor. When I first created

Sonar, this was an ok package, but it's always had some bugs, and it

hasn't had any real updates in four years. Instead, I've integrated a

new package called "react-mde", which is a fully controlled react

component for editing and previewing markdown.
I've also tweaked the UI a bit in the status report editor, moving the

save button into the header line, as well as creating a new "Preview"

toggle switch (which replaces the one that EpicEditor would show inside

its edit region).

Viewed, listed, and edited a bunch of status reports. Verified that

editing worked whether the status report was brand new (in which case it

was pre-populated with the template) or existing (in which case it was

properly loaded).