Display conditions - Added data model selection

Display conditions - Added static and dynamic condition types

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

@@ -5,10 +5,20 @@ namespace Artemis.Core.Models.Profile.Conditions
 {
     public class DisplayConditionPredicate : DisplayConditionPart
     {
-        public Guid DataModelGuid { get; set; }
-        public string PropertyPath { get; set; }
-
+        public PredicateType PredicateType { get; set; }
         public DisplayConditionOperator Operator { get; set; }
-        public object Value { get; set; }
+
+        public Guid LeftDataModelGuid { get; set; }
+        public string LeftPropertyPath { get; set; }
+        
+        public Guid RightDataModelGuid { get; set; }
+        public string RightPropertyPath { get; set; }
+        public object RightStaticValue { get; set; }
+    }
+
+    public enum PredicateType
+    {
+        Static,
+        Dynamic
     }
 }