Keep stored home API keys hidden on edit

test/test_support.dart

@@ -73,6 +73,9 @@ class FakeIgnisApi extends IgnisApi {
   String? deletedGroupId;
   Map<String, dynamic>? scheduledOnceParams;
   Map<String, dynamic>? scheduledCronParams;
+  String? validatedBaseUrl;
+  String? validatedApiKey;
+  int validateCredentialsCalls = 0;
   int rescanCalls = 0;
 
   FakeIgnisApi({
@@ -99,6 +102,9 @@ class FakeIgnisApi extends IgnisApi {
 
   @override
   Future<void> validateCredentials(String baseUrl, String apiKey) async {
+    validateCredentialsCalls += 1;
+    validatedBaseUrl = baseUrl;
+    validatedApiKey = apiKey;
     final error = authError;
     if (error != null) throw error;
   }