DeliveryConfirmation: Add user editable Text

Elwig/Documents/DeliveryConfirmation.cshtml.cs

@@ -9,12 +9,14 @@ namespace Elwig.Documents {
 
         public int Year;
         public IEnumerable<DeliveryPart> Deliveries;
+        public string? Text = App.Client.TextDeliveryConfirmation;
 
         public DeliveryConfirmation(AppDbContext ctx, int year, Member m) :
             base($"Anlieferungsbestätigung {year} – {((IAddress?)m.BillingAddress ?? m).Name}", m) {
             Year = year;
             ShowDateAndLocation = true;
             UseBillingAddress = true;
+            IncludeSender = true;
             // FIXME footer in merged documents
             //DocumentId = $"Anl.-Best. {Year}/{m.MgNr}";
             Deliveries = ctx.DeliveryParts.FromSqlRaw($"""