hide/show 'stop rebalance' & 'add button'
hide/show 'stop rebalance' & 'add button'

Change-Id: Iec0cd025b3365ef2b75c8cecf82bb6d6540705d8
Reviewed-on: http://review.northscale.com:8080/560
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

mschoch/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,daverigby/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,ceejatec/ns_server,ingenthr/ns_server,pavel-blagodov/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,daverigby/ns_server,ceejatec/ns_server,vzasade/ns_server,mschoch/ns_server,membase/ns_server,daverigby/ns_server,vzasade/ns_server,ceejatec/ns_server,vzasade/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,daverigby/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,membase/ns_server,ingenthr/ns_server,ingenthr/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,ceejatec/ns_server,vzasade/ns_server,pavel-blagodov/ns_server,ingenthr/ns_server,nimishzynga/ns_server,ceejatec/ns_server,membase/ns_server,membase/ns_server,mschoch/ns_server,membase/ns_server,mschoch/ns_server,membase/ns_server