Refine UI/UX for custom css / footer text. Add switch for show/hide powered by

src/languages/de-DE.js

@@ -443,6 +443,6 @@ export default {
     "Fingerprint:": "Fingerabdruck:",
     "No status pages": "Keine Status-Seiten",
     Customize: "Anpassen",
-    "Custom Footer": "Eigener Footer (Leerlassen für Standard)",
+    "Custom Footer": "Eigener Footer",
     "Custom CSS": "Eigenes CSS",
 };

src/languages/en.js

@@ -355,7 +355,7 @@ export default {
     serwersmsSenderName: "SMS Sender Name (registered via customer portal)",
     stackfield: "Stackfield",
     Customize: "Customize",
-    "Custom Footer": "Custom Footer (empty string for default)",
+    "Custom Footer": "Custom Footer",
     "Custom CSS": "Custom CSS",
     smtpDkimSettings: "DKIM Settings",
     smtpDkimDesc: "Please refer to the Nodemailer DKIM {0} for usage.",