Fix for DFL-3708, Keyboard navigation scrolls the view before its necessary, sometimes scrolls selected item out of view

Also, use the clientHeight of the container to account for the height of the horizontal scrollbar

Author: p01

src/resource-manager/resource_service.js

@@ -280,7 +280,7 @@ cls.ResourceInspector = function(network_logger)
       var container = this.tree_view.get_container().firstChild;
       var y = container.scrollTop;
       var max_y = e.offsetTop;
-      var min_y = max_y + e.offsetHeight - container.offsetHeight;
+      var min_y = max_y + e.offsetHeight - container.clientHeight;
 
       if (y < min_y)
         container.scrollTop = min_y;
@@ -312,17 +312,18 @@ cls.ResourceInspector = function(network_logger)
     {
       this.highlight_resource(uid);
       this.detail_view.show_resource(uid);
+      return true;
     }
   };
 
   this.highlight_next_resource_bound = function()
   {
-    this._highlight_sibling_resource(-1);
+    return !this._highlight_sibling_resource(-1);
   }.bind(this);
 
   this.highlight_previous_resource_bound = function()
   {
-    this._highlight_sibling_resource(1);
+    return !this._highlight_sibling_resource(1);
   }.bind(this);
 
   this._resource_request_update_bound = function(msg)