Pools as a top level window

[fire-eggs]

Pools have now been added to the db. To take advantage of this, a pools window might be appropriate.

• Show pool names
• Ability to filter on pool names
• Selecting a pool sets the image list to the images in the pool

[fire-eggs]

If this is to become the 'Favorites' manager, would need to:

• Be able to filter to show only "user pools"
• Ability to CRUD user pools
• Ability to add an image to a user pool [new feature in the image view window]