Minor index.html change.
Hook up rudimentary edit button action for the approvals page.
Implement rpc update_project_request.  Added display, editing, approved
and rejected modes to the submissions display list.
Updated description field hint.
Minor fixes.
Stop using mimetypes.guess_extension.  It's buggy.  Just encode the
mimetype directly.  Work in progress changes toward fixing project list
reloads on save.
Fix multiple project list load bug.
Minor fixes.