MB-23646: show tasks progress bar automatically only for rebalance
MB-23646: show tasks progress bar automatically only for rebalance

Change-Id: Ibcb861e515d8fe16bc3a86d37a25fa24665cd25e
Reviewed-on: http://review.couchbase.org/76455
Tested-by: Pavel Blagodov <596b71e626fc58dbdad141b817770e3e4810bb9b@gmail.com>
Reviewed-by: Michael Wiederhold <a17fed27eaa842282862ff7c1b9c8395a26ac320@couchbase.com>

ceejatec/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,ceejatec/ns_server,membase/ns_server,ceejatec/ns_server,ceejatec/ns_server,membase/ns_server