Ember - donation system, bans, loading screen & landing/index page

1. Added a global AJAX progress bar
2. Fixed a possible group sync conflict
3. Disabled requesting shipping address for store transactions
4. Added a port field to database configuration
5. Other bug fixes and improvements

Files modified:

1. web/app/Controllers/ServerApiController.php
2. web/app/Helpers.php
3. web/app/Middleware/GuestMiddleware.php
4. web/app/routes.php
5. web/bootstrap/app.php
6. web/composer.json
7. web/composer.lock
8. web/config.php
9. web/package-lock.json
10. web/package.json
11. web/public/css/app.css
12. web/public/css/dark.css
13. web/public/js/app.js
14. web/public/mix-manifest.json
15. web/resources/js/app.js
16. web/resources/js/scripts/ui.js
17. web/resources/sass/app.scss
18. web/resources/views/notifications.twig
19. web/resources/views/store/credits.twig
20. web/vendor/bin/*
21. web/vendor/composer/*
22. web/vendor/league/html-to-markdown/*