Aa-sov-timer

Changed

- Improved the task code
- Improved date/time localization
- Improved the code for the `sovtimer_static` template tag

Removed

- Redundant localization call in JavaScript

Fixed

- The last campaign wasn't removed reliably when there were no more campaigns reported
by ESI

Changed

- Localize datetime output in the campaign table
- Use DataTables' translations instead of our own
- Simplify constant names
- Make ajax call URL an internal URL
- Translations updated

Fixed

- `TypeError: object of type 'NoneType' has no len()` in update task.
Thank you, CCP, for reinvigorating null-sec with the Equinox update. This led to a
period when there were no sovereignty campaigns at all, which gave me the chance
to find this bug. Now this bug is fixed, you can make null-sec great again, please,
and thank you.

Fixed

- Upcoming Timer Threshold

Changed

- Use `django-sri` for sri hashes
- Material Icon font updated to v143
- Minimum requirements
- Alliance Auth >= 4.6.0

Fixed

- Escaping translation strings to fix potential issues with French and Italian translations

Changed

- Set user agent according to MDN guidelines

Added

- Integrity hashes for the static files
- More logging to the task, since I couldn't believe there are no sovereignty
campaigns at all. Well, the Equinox update works, null-sec is "truly" reinvigorated.

Changed

- Hide campaign type column. Since there is now only one campaign type, we don't need it.
- Proper JS settings merge