Attempt to make dropdown item actions more consistent

Summary:
See D17210. Currently, this handler needs to be installed on each menu that doesn't build with the default behavior.

Rather than copy-pasting it to the user menu, try to make it a default behavior. This adds a new rule: don't close the menu if the item is a dynamic item built in JS with PHUIXActionView.

This allows dynamic items to control the menu themselves, while giving static items the desired default behavior.

Test Plan:
  - Opened menus on: dashboards, user menu, timeline comments. Clicked stuff. Menus went away.
  - Other menus still seemed to work right: Diffusion, Favorites, mobile menu.

Reviewers: chad

Reviewed By: chad

Differential Revision: https://secure.phabricator.com/D17222

webroot/rsrc/js/application/projects/behavior-project-boards.js

@@ -34,13 +34,6 @@ JX.behavior('project-boards', function(config, statics) {
       data.menu = new JX.PHUIXDropdownMenu(button);
       data.menu.setContent(list);
       data.menu.open();
-
-      JX.DOM.listen(list, 'click', 'tag:a', function(e) {
-        if (!e.isNormalClick()) {
-          return;
-        }
-        data.menu.close();
-      });
     });
 
     JX.Stratcom.listen(