Aa-srp

Fixed

- \[Compatibility\] AA 3.x / Django 4 :: ImportError: cannot import name
'ugettext_lazy' from 'django.utils.translation'

Fixed

- Modal windows

Added

- More logging to the Discord message logic

Fixed

- Enable editable SRP amount field only for pending and rejected requests (51)
- CSS classes in templates
- Only count approved SRP requests towards the total SRP costs

Changed

- JavaScript modernised

Changed

- `models.TextChoices` refactored for better code readability
- Using `path` in URL config instead of soon-to-be removed `url`

Removed

- Outdated management commands. By now everyone should have updated to a version
where they're no longer needed. No one should have a version that's older than a
year ...

Fixed

- Don't try to get a character name from a deleted user account. There is none.

Changed

- Try harder with the Discord messages. (`discordproxy` is the prioritized way to
send messages to Discord, but if anything fails with it, always try for
`allianceauth-discordbot` to get the message out)

Added

- Better handling for Discord messages (Prioritise `discordproxy` over
`allianceauth-discordbot` when both are installed)
- Embedded Discord messages to the SRP team channel, when `discordproxy` is installed

Fixed

- Import from a module that might not even be there at all, which could have
resulted in Discord PMs not being delivered