itunes 11 multiple windows

So far iTunes 11 seems decent, looks nice. However, previously I kept multiple windows open. For example one on the store to do searches, view categories, check for app updates, etc and one on my main library for playing music.

To create a new window you used to double-click on the category in the left side navigation window. I.e. double click on store to get a store window.

That doesn't work with iTunes 11. Nothing else seems to either (i,e. dragging the category from itunes 11, right clicking on it, etc. Nothing in the menus shows "new window" either.

Any ideas? Thanks.