* src/modest-tny-local-folders-account.c:

* src/modest-tny-local-folders-account.c:
        * Release reference to outbox folder when the account is
          finalized. This was a reference leak.
* src/modest-runtime.c:
        * Release signal handlers before singletons, as they keep
          references to the send queues.
        * Also fix a double reference (one leaking) on adding new
          send queues to cache.
* src/modest-tny-send-queue.c:
        * Finalize parent tny send queue before we unref the sentbox and
          outbox, as these references are used in parent finalize.

pmo-trunk-r4737