Instead of flushing the OMEMO store to disk after each operation, do it
only once after all recipients are processed.
A user reported a long delay between hitting enter on the keyboard and the
message being sent on the wire in an OMEMO-enabled group chat. This patch
hopefully improves this situation.
Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>
cbe6dac448