patch: Fix filtering by state
patch: Fix filtering by state

The '--state' parameter wasn't doing anything. Correct this, and set a
sensible default corresponding to the default list of 'action_required'
states found in Patchwork.

Signed-off-by: Stephen Finucane <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@that.guru>
Closes-bug: #8

stephenfin/git-pw,getpatchwork/git-pw