Fix to timberline string coverter and newlines

InABox.Poster.Timberline/TimberlineConverters.cs

@@ -30,6 +30,7 @@ namespace InABox.Poster.Timberline
             {
                 str = str[..MaxLength];
             }
+            str = str.ReplaceLineEndings("");
             return str;
         }
     }