[chore:] sender address editing

MainWindow.axaml

@@ -329,6 +329,13 @@
                                                  TextChanged="TbSettingsCustomerDescription_OnTextChanged"
                                                  x:Name="TbSettingsCustomerDescription" />
                                     </Grid>
+                                    <Grid ColumnDefinitions="150,*">
+                                        <Label Content="Absenderadresse" />
+                                        <TextBox Grid.Column="1" Watermark="Absenderadresse"
+                                                 HorizontalAlignment="Stretch"
+                                                 TextChanged="TbSettingsCustomerSenderAddress_OnTextChanged"
+                                                 x:Name="TbSettingsCustomerSenderAddress" />
+                                    </Grid>
                                     <Grid ColumnDefinitions="150,*">
                                         <Label Content="CSV-Trennzeichen" />
                                         <TextBox Grid.Column="1" Watermark=","

MainWindow.axaml.cs

@@ -303,6 +303,7 @@ public partial class MainWindow : Window
             {
                 TbSettingsCustomerDescription.Text = customer.description;
                 TbSettingsCustomerName.Text = customer.name;
+                TbSettingsCustomerSenderAddress.Text = customer.sender_address;
                 TbSettingsCustomerCsvSeparator.Text = customer.separator.ToString();
                 if (customer.patch != null)
                     TbSettingsCustomerPatchInfo.Text = customer.patch.ToString();
@@ -565,4 +566,12 @@ public partial class MainWindow : Window
             "output.pdf"
         );
     }
+
+    private void TbSettingsCustomerSenderAddress_OnTextChanged(object? sender, TextChangedEventArgs e)
+    {
+        if (LstSettingsCustomers.SelectedIndex == null || LstSettingsCustomers.SelectedIndex == -1) return;
+        foreach (var customer in Settings._instance.customers.customers)
+            if (customer.ID == Settings._instance.customers.current)
+                customer.sender_address = TbSettingsCustomerSenderAddress.Text;
+    }
 }

Settings.cs

@@ -121,10 +121,12 @@ public class Customer
 
     public string name { get; set; } = "";
     public string description { get; set; } = "";
+    public string sender_address { get; set; } = "";
     public AddressPatch patch { get; set; }
     public char separator { get; set; } = ',';
     public int ID { get; }
 
+
     public static int GetIDByCustomerListItem(string item_content)
     {
         var id = item_content.Split(" - ")[0];