TODOs Finalizing Starflyer2 migration

• mail templates now need to get retrieved from the main templates. For this we need to have a method in starflyer to get a template for a module. Right now the jinja_env is used:

  if self.config.use_html_mail:
     html = self.app.jinja_env.get_or_select_template(tmplname+".html").render(**kw)
     txt = self.app.jinja_env.get_or_select_template(tmplname+".txt").render(**kw)
     mailer.mail_html(to, subject, txt, html)
  else:
     txt = self.app.jinja_env.get_or_select_template(tmplname+".txt").render(**kw)
     mailer.mail(to, subject, txt)
  

  We might need to look at this anyway

• all template paths need to be adapted

• all module_template occurences have to get merged to main template folder

• which templates and files do we actually still need? general cleanup necessary