the broadcast notifications are returned with the same queries as user
notifications with only few exceptions in the store
Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>
using same topic twice will restore existing notification in that topic
if any. this can be useful if you want to remind users about some
specific thing over time
Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>