AdministrationWindow: Fix default value handling

Elwig/Windows/MemberAdminWindow.xaml.cs

@@ -106,6 +106,7 @@ namespace Elwig.Windows {
                 AreaCommitmentButton.IsEnabled = false;
                 DeliveryButton.IsEnabled = false;
                 ClearOriginalValues();
+                ClearDefaultValues();
                 ClearInputs(validate);
                 ClearInputStates();
             }
@@ -113,13 +114,20 @@ namespace Elwig.Windows {
         }
 
         private async void InitInputs() {
+            ClearOriginalValues();
+            ClearDefaultValues();
+
             MgNrInput.Text = (await Context.NextMgNr()).ToString();
             EntryDateInput.Text = DateTime.Now.ToString("dd.MM.yyyy");
             if (Context.Branches.Count() == 1)
                 BranchInput.SelectedItem = Context.Branches.First();
             ActiveInput.IsChecked = true;
             ContactPostalInput.IsChecked = true;
-            FinishInputFilling();
+
+            SetDefaultValue(MgNrInput);
+            SetDefaultValue(EntryDateInput);
+            SetDefaultValue(ActiveInput);
+            ValidateRequiredInputs();
         }
 
         protected override async Task RenewContext() {
@@ -439,6 +447,7 @@ namespace Elwig.Windows {
 
         private void FillInputs(Member m) {
             ClearOriginalValues();
+            ClearDefaultValues();
 
             MgNrInput.Text = m.MgNr.ToString();
             PredecessorMgNrInput.Text = m.PredecessorMgNr.ToString();