BusinessDocument: Add DateFrom to be used for ShowDateAndLocation

Elwig/Documents/Document.cs

@@ -49,14 +49,12 @@ namespace Elwig.Documents {
         public bool IsPreview = false;
         private iText.Layout.Document? _doc;
 
-        public int CurrentNextSeason;
         public string? DocumentId;
         public string Title;
         public string Author;
         public DateOnly Date;
 
         public Document(string title) {
-            CurrentNextSeason = Utils.CurrentNextSeason;
             Title = title;
             Author = App.Client.NameFull;
             Date = DateOnly.FromDateTime(Utils.Today);