views: use id__in = get_patch_ids() to get the modified patch set

views: use id__in = get_patch_ids() to get the modified patch set

Currently, we generic_list processes patches in order of the patch_id:X
parameter, which is arbitrarily decided by the browser.

By using id__in, we get patches sorted by the default Patch model
ordering. This means that the (arbitrary) order of get_patch_ids()
doesn't affect the ordering of patches that we process, and bundles
are created with a reasonable default patch order.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>