Out tables are smart enough to remember state: sort the "Included packages" table by Recipe and then move to the "All packages" table. When you return to the "Included packages" table it is still sorted by Recipe.

This is great interaction, but currently the state of the tables is remembered across image edits. For example:

* Select qemux86 as your machine and core-image-minimal as your base image
* Click 'Edit image'
* Sort the "Included recipes" table by Group
* Click 'Cancel'
* Change your base image selection to core-image-clutter
* Click "Edit image"

The "Included recipes" table is still sorted by Group. This is overkill: "Cancel" should reset any screens related to the image customisation process. Therefore, the moment I hit the 'Cancel' button, all tables should return to the default sorting (in the case of the "Included recipes" table, by recipe name A to Z).