You can now mark fixed donations as already paid on creation

ref #133

src/locales/de.json

@@ -436,5 +436,7 @@
   "total-paid-amount": "Gezahlter Gesamtbetrag",
   "paid-amount": "Gezahlter Betrag",
   "paid": "BEZAHLT",
-  "open": "OFFEN"
+  "open": "OFFEN",
+  "already-paid": "Bereits bezahlt",
+  "unpaid": "Offen"
 }