Prevent duplicate notifications from being displayed
Prevent duplicate notifications from being displayed

This changeset also includes code that removes notifications from the collection when they are dismissed or they timeout

Signed-off-by: Don Naegely <e690a32c1e2176a2bfface09e204830e1b5491e3@gmail.com>

chop-dbhi/cilantro,chop-dbhi/cilantro,chop-dbhi/cilantro