Recall fails when called outside of the "postpone" folder (usually
"Drafts"). This makes sense for postponed messages. However, sometimes
the user would like to re-edit and re-send an old, possibly sent,
message, which would serve as a basis for the new one.
This patch allows recall to work outside the postpone folder, thus
allowing for re-edition of any message.
In the original recall function, if the recalled message is found in the
"postpone" folder, once the message has been recalled, re-edited and
sent, the original draft is deleted. With this patch, when the message
is not in the "postpone" folder, the original message is not deleted.
Signed-off-by: inwit <inwit@sindominio.net>