Add "show only completed" to query

WebCms/Models/LeafDataQuery.cs

@@ -1,6 +1,4 @@
-using System.Collections.Specialized;
-using System.ComponentModel.DataAnnotations;
-using System.Runtime.CompilerServices;
+using System.ComponentModel.DataAnnotations;
 
 namespace LeafWeb.WebCms.Models
 {
@@ -58,6 +56,9 @@ namespace LeafWeb.WebCms.Models
         [RegularExpression(FloatingPointRegex, ErrorMessage = "Must be numeric")]
         public string phips2 { get; set; }
 
+        [Display(Name = "Show Only Successfully Completed")]
+        public bool completed { get; set; }
+
         public bool HasExtendedParameters =>
             !(
                 string.IsNullOrEmpty(siteid)
@@ -70,6 +71,7 @@ namespace LeafWeb.WebCms.Models
                 && string.IsNullOrEmpty(pari)
                 && string.IsNullOrEmpty(tleaf)
                 && string.IsNullOrEmpty(phips2)
+                && !completed
             );
     }
 }