Release 0.4.3 with contextual help and parcel deduplication

Services/MapExportService.cs

@@ -85,7 +85,7 @@ public sealed class MapExportService
     {
         var root = new XElement("gpx",
             new XAttribute("version", "1.1"),
-            new XAttribute("creator", "LME Mappe Catastali 0.4.2"),
+            new XAttribute("creator", "LME Mappe Catastali 0.4.3"),
             new XAttribute(XNamespace.Xmlns + "xsi", "http://www.w3.org/2001/XMLSchema-instance"),
             new XElement("metadata", new XElement("name", name)));
         foreach (var feature in features.EnumerateArray())