Fixed currency admin page and modernized underlying swap packages

Fixes issue #1009

Author: jbtronics

composer.json

@@ -25,8 +25,7 @@
         "doctrine/doctrine-migrations-bundle": "^3.0",
         "doctrine/orm": "^3.2.0",
         "dompdf/dompdf": "^v3.0.0",
-        "florianv/swap": "^4.0",
-        "florianv/swap-bundle": "dev-master",
+        "part-db/swap-bundle": "^6.0.0",
         "gregwar/captcha-bundle": "^2.1.0",
         "hshn/base64-encoded-file": "^5.0",
         "jbtronics/2fa-webauthn": "^3.0.0",