Währungen in Kleinbuchstaben und kleine Fixes

import-currencies.pb.js

@@ -23,7 +23,7 @@ function runImport() {
 		let match;
 		while ((match = CURRENCY_RATE_REGEX.exec(xml)) !== null) {
 			rates.push({
-				currency: match[1],
+				currency: match[1].toLowerCase(),
 				rate: parseFloat(match[2]),
 			});
 		}