removes unneeded contentpicker dialog and just uses the standard tree picker that has the correct search built in, now search is working for the link picker.

src/Umbraco.Web/Trees/MediaTreeController.cs

@@ -81,11 +81,12 @@ namespace Umbraco.Web.Trees
                 entity.HasChildren && (isContainer == false));
 
             node.AdditionalData.Add("contentType", entity.ContentTypeAlias);
-            
-
 
             if (isContainer)
+            {
                 node.SetContainerStyle();
+                node.AdditionalData.Add("isContainer", true);
+            }
 
             return node;
         }

src/Umbraco.Web/Trees/MemberTreeController.cs

@@ -82,6 +82,7 @@ namespace Umbraco.Web.Trees
                     false);
 
                 node.AdditionalData.Add("contentType", member.ContentTypeAlias);
+                node.AdditionalData.Add("isContainer", true);
 
                 return node;
             }
@@ -135,6 +136,8 @@ namespace Umbraco.Web.Trees
 
             //There is no menu for any of these nodes
             nodes.ForEach(x => x.MenuUrl = null);
+            //All nodes are containers
+            nodes.ForEach(x => x.AdditionalData.Add("isContainer", true));
 
             return nodes;
         }