Add Logiqx deserialization test, fix issues

SabreTools.Models/Logiqx/SoftwareList.cs

@@ -0,0 +1,22 @@
+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Models.Logiqx
+{
+    [XmlRoot("softwarelist")]
+    public class SoftwareList : ItemBase
+    {
+        [XmlAttribute("tag")]
+        public string Tag { get; set; }
+
+        [XmlAttribute("name")]
+        public string Name { get; set; }
+
+        /// <remarks>(original|compatible)</remarks>
+        [XmlAttribute("status")]
+        public string Status { get; set; }
+
+        [XmlAttribute("filter")]
+        public string? Filter { get; set; }
+    }
+}