Ref T826

- Shows all fediverse followers and email subscribers
- Shows number of email subscribers on Stats page
- Links to Subscribers page from Stats page

Requires running `make ui` to regenerate stylesheet.

Ref T826

This allows setting a URL, and then renders a <link> element
in the head of the blog. It requires a database migration.

Ref T744

Fixes #720

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

Originally requested on the forum:
https://discuss.write.as/t/use-non-random-ids-for-untitled-posts-in-blog-stats/5046

Will render if a file exists at: static/local/custom.css

Ref T563

Ref T874 T744

This adds beginning email subscription functionality, with only MySQL support,
Mailgun support, and incomplete support for private instances. It includes
database changes, so run:

    writefreely db migrate

to use this feature.

Ref T856

This adds a configuration option to the [app] section: open_deletion. When
true, users can delete their account on their own.

Ref T319

This requires admins to generate a new encryption key with:
  writefreely keys generate

Ref T319

This mimics the admin UI for deleting a user account.

Ref T319

Ref T319

Ref T401

Ace doesn't work well with touchscreen devices, so instead we fall back to a
plain textarea.

This fixes an issue with Safari not allowing users to select *.md files.

Closes #334

Some WriteFreely instances are completely private, and thus have no need for public-
oriented features like Web Monetization. Like federation, this gives admins control
over whether or not the feature is enabled for users.

Ref T773

Ref T773

Closes T708

This uses the main navigation bar for the Customize and Stats pages, instead of the collection-navigation bar used for multi-user / multi-collection instances.

This makes it easier to navigate between different blog sections: Customize, Stats, View.

This includes the platform mark with each login button and uses
brand colors. It also uses the same style on the Account Settings
page. And it wraps buttons on login / signup pages.

This adds a "load more" button to the bottom of the draft posts page,
which calls /api/me/posts with new parameters and the current page
number. It then populates the page accordingly.

Ref T696 - load anon. posts with ?anonymous=1&page=1
Ref T401 - completes UI for post loading

This enables users to add a signature to all blog posts, and update it from a single location.

Requires database migration with: writefreely db migrate

Closes T582

Add generic Oauth allow_logout option

- Break up linked / to-link sections
- Add logos for all services
- Lay out buttons horizontally
- Tweak the copy

Ref T713

This includes the chosen GitLab display name in the button text.

- Add a description to each config item
- Change item names to make more sense

Ref T694