We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
Some system emails need to be manually reviewed before being sent. This
new action allows admins to see a preview of all Pending to be sent
Proposal Notification Digest messages.
Admins need to be able to see what a particular System Email looks like
with dummy data.
Also adding the first system email to be managed: the proposal
notification digest.
In case the current admin doesn't have any Notifications from
ProposalNotifications there will be a crash. We'll solve this in later
PR's with a system to "inject" sample text in email templates without
having to generate records in the database.
