4d2d3fb439abe402e45cc69f790c2556423cf22d
braney
  Tue Feb 6 16:00:53 2018 -0800
add new tracks to the collection that contains the selected track.

diff --git src/hg/js/hgCollection.js src/hg/js/hgCollection.js
index cc6c659..cc86533 100644
--- src/hg/js/hgCollection.js
+++ src/hg/js/hgCollection.js
@@ -266,42 +266,51 @@
             var z = v[i];
             names[z.li_attr.name] = 1;
         }
     }
 
     function checkEmpty(parentId) {
         if ($('#'+parentId).hasClass('empty')) {
             var parentNode = $(selectedTree).jstree('get_node', parentId);
             var stub = parentNode.children[0];
             $(selectedTree).jstree('delete_node', stub);
             $('#'+parentId).removeClass('empty');
             parentNode.li_attr.class = 'folder';
         }
     }
 
+    function findCollection(parentNode) {
+        while(parentNode.parent !== '#') {
+            parentNode = $(selectedTree).jstree("get_node", parentNode.parent);
+        }
+
+        return parentNode.id;
+    }
+    
     function plusHit(event, data) {
         // called with the plus icon is hit
         if (selectedNode === undefined) {
             alert(addWithoutCollectionText);
             return;
         }
 
         var treeObject = $(event.currentTarget).parent().parent();
         var id = treeObject.attr('id');
         var node = treeObject.jstree("get_node", id);
         if (node.children.length === 0) {
             var parentId = $(selectedNode).attr('id');
+            parentId = findCollection(selectedNode);
             checkEmpty(parentId);
             isDirty = true;
             $(selectedTree).jstree("copy_node", node, parentId,'last');
         }
     }
 
     function minusHit (event, data) {
         // called with the minus icon is hit
         var treeObject = $(event.currentTarget).parent().parent();
         var id = treeObject.attr('id');
         var node = treeObject.jstree("get_node", id);
         if (node.children.length === 0) {
             isDirty = true;
             var parentNode = treeObject.jstree("get_node", node.parent);
             if (parentNode.children.length === 1) {