Data model visualization - Simplified and improved VMs

Layer conditions - Added left side property selection

src/Artemis.Core/Models/Profile/Conditions/DisplayConditionGroup.cs

@@ -0,0 +1,17 @@
+using Artemis.Core.Models.Profile.Conditions.Abstract;
+
+namespace Artemis.Core.Models.Profile.Conditions
+{
+    public class DisplayConditionGroup : DisplayConditionPart
+    {
+        public BooleanOperator BooleanOperator { get; set; }
+    }
+
+    public enum BooleanOperator
+    {
+        And,
+        Or,
+        AndNot,
+        OrNot
+    }
+}