Update AppConfig names, Add output fields in Case, sum and etc, and fix distinct issue before delete

Fix review sidebar item widths

The previous grid layout supported four columns but certain evaluation
strings would generate overlaps.  This modifies the CSS to ensure each
column has enough space to render the currently known possible values.

I did spend some time trying to find a solution that would dynamically
fill the full grid width even in cases where there are only three
columns, but couldn't find a pure-CSS solution in my time box.  This
does mean that in cases where the user doesn't have access to the
"Actions" associated with a review they are losing 25% (the fourth
column) of real estate for no reason.  This might be worth exploring
again in future.

Issue #2729

Hide admin button for users without admin access

There are several types of user with access to the review dashboard, but
only administrators are allowed to view the administrator pane.

This updates the admin dashboard to only render the admin button for
users with admin permission.  It also adds an ID to the button so
that test can reliably check for the presence of the button.

Issue #2724

Bump url-parse from 1.5.3 to 1.5.7

Bumps [url-parse](https://github.com/unshiftio/url-parse) from 1.5.3 to 1.5.7.
- [Release notes](https://github.com/unshiftio/url-parse/releases)
- [Commits](https://github.com/unshiftio/url-parse/compare/1.5.3...1.5.7

)

---
updated-dependencies:
- dependency-name: url-parse
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Environs env.url() returns a URL object so replace with env.str()

Use environs package to parse  .env variables.

Add collectstatic step to CI.

Bump follow-redirects from 1.14.7 to 1.14.8

The `AdminFactory` had a bug: `is_admin` is not a field, but
`is_superuser` is.

No tests were using the factory so this went unnoticed, but I'm about to
want to use it.

chore: gitignore .mo files

Bumps [follow-redirects](https://github.com/follow-redirects/follow-redirects) from 1.14.7 to 1.14.8.
- [Release notes](https://github.com/follow-redirects/follow-redirects/releases)
- [Commits](https://github.com/follow-redirects/follow-redirects/compare/v1.14.7...v1.14.8

)

---
updated-dependencies:
- dependency-name: follow-redirects
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Closes #2720

Add .editorconfig

Editorconfig is a standard that helps editors know what whitespace rules
to follow for a given project.

For more information, see:

https://editorconfig.org/

These rules were determined based on feedback from project maintainers.

There are some files that use different numbers of spaces, but these
files were imposed on the project externally.  We use 4 everywhere we
touch.

Issue #2716

Ensure errors are on top

In certain cases validation errors could be hidden by components that
were rendered "on top" (e.g. in the case of required rich text fields).

Providing a z-index signals that they belong on top.

Issue #2718

Add Finance flow fixes and notifications