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

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

Files modified:

• web/app/Controllers/ServerApiController.php
• web/app/Helpers.php
• web/app/Middleware/GuestMiddleware.php
• web/app/routes.php
• web/bootstrap/app.php
• web/composer.json
• web/composer.lock
• web/config.php
• web/package-lock.json
• web/package.json
• web/public/css/app.css
• web/public/css/dark.css
• web/public/js/app.js
• web/public/mix-manifest.json
• web/resources/js/app.js
• web/resources/js/scripts/ui.js
• web/resources/sass/app.scss
• web/resources/views/notifications.twig
• web/resources/views/store/credits.twig
• web/vendor/bin/*
• web/vendor/composer/*
• web/vendor/league/html-to-markdown/*