Update "dashboard" setting documentation
Update "dashboard" setting documentation

Updates documentation for the Horizon "dashboard" setting.
The option works as designed, but is incorrectly documented.

Change-Id: I4d11528c25ef43f91977321055b3660d144b3c90
Closes-Bug: 1056449

yjxtogo/horizon,NeCTAR-RC/horizon,karthik-suresh/horizon,django-leonardo/horizon,ging/horizon,promptworks/horizon,bac/horizon,mrunge/horizon_lib,tsufiev/horizon,orbitfp7/horizon,Dark-Hacker/horizon,newrocknj/horizon,davidcusatis/horizon,CiscoSystems/avos,philoniare/horizon,xinwu/horizon,karthik-suresh/horizon,endorphinl/horizon,redhat-openstack/horizon,icloudrnd/automation_tools,doug-fish/horizon,j4/horizon,redhat-openstack/horizon,henaras/horizon,CiscoSystems/horizon,noironetworks/horizon,yanheven/console,takeshineshiro/horizon,CiscoSystems/horizon,Tesora/tesora-horizon,froyobin/horizon,orbitfp7/horizon,Hodorable/0602,gochist/horizon,noironetworks/horizon,dan1/horizon-x509,tqtran7/horizon,karthik-suresh/horizon,bigswitch/horizon,tellesnobrega/horizon,eayunstack/horizon,sandvine/horizon,anthonydillon/horizon,redhat-cip/horizon,luhanhan/horizon,luhanhan/horizon,mdavid/horizon,wolverineav/horizon,FNST-OpenStack/horizon,RudoCris/horizon,BiznetGIO/horizon,tqtran7/horizon,ChameleonCloud/horizon,philoniare/horizon,newrocknj/horizon,xinwu/horizon,bigswitch/horizon,henaras/horizon,orbitfp7/horizon,mrunge/horizon,coreycb/horizon,zouyapeng/horizon,vladryk/horizon,kfox1111/horizon,promptworks/horizon,NCI-Cloud/horizon,CiscoSystems/avos,maestro-hybrid-cloud/horizon,blueboxgroup/horizon,NCI-Cloud/horizon,zouyapeng/horizon,j4/horizon,mdavid/horizon,coreycb/horizon,mrunge/openstack_horizon,mrunge/horizon_lib,ging/horizon,RudoCris/horizon,tellesnobrega/horizon,endorphinl/horizon,CiscoSystems/avos,froyobin/horizon,wangxiangyu/horizon,tanglei528/horizon,flochaz/horizon,redhat-openstack/horizon,ChameleonCloud/horizon,endorphinl/horizon-fork,CiscoSystems/horizon,Hodorable/0602,Dark-Hacker/horizon,ging/horizon,wangxiangyu/horizon,Metaswitch/horizon,Solinea/horizon,dan1/horizon-proto,damien-dg/horizon,pranavtendolkr/horizon,yeming233/horizon,blueboxgroup/horizon,j4/horizon,davidcusatis/horizon,NeCTAR-RC/horizon,agileblaze/OpenStackTwoFactorAuthentication,CiscoSystems/horizon,takeshineshiro/horizon,bac/horizon,VaneCloud/horizon,saydulk/horizon,gerrive/horizon,damien-dg/horizon,BiznetGIO/horizon,NeCTAR-RC/horizon,Daniex/horizon,Solinea/horizon,wolverineav/horizon,FNST-OpenStack/horizon,henaras/horizon,mandeepdhami/horizon,FNST-OpenStack/horizon,wolverineav/horizon,yjxtogo/horizon,Daniex/horizon,VaneCloud/horizon,takeshineshiro/horizon,JioCloud/horizon,Daniex/horizon,Dark-Hacker/horizon,redhat-cip/horizon,zouyapeng/horizon,noironetworks/horizon,liyitest/rr,Tesora/tesora-horizon,philoniare/horizon,saydulk/horizon,kfox1111/horizon,agileblaze/OpenStackTwoFactorAuthentication,Mirantis/mos-horizon,redhat-openstack/horizon,wangxiangyu/horizon,flochaz/horizon,xme1226/horizon,kfox1111/horizon,anthonydillon/horizon,saydulk/horizon,j4/horizon,maestro-hybrid-cloud/horizon,watonyweng/horizon,izadorozhna/dashboard_integration_tests,orbitfp7/horizon,yanheven/console,pranavtendolkr/horizon,blueboxgroup/horizon,Metaswitch/horizon,gochist/horizon,karthik-suresh/horizon,Daniex/horizon,bac/horizon,django-leonardo/horizon,mdavid/horizon,mandeepdhami/horizon,dan1/horizon-x509,watonyweng/horizon,sandvine/horizon,NeCTAR-RC/horizon,luhanhan/horizon,openstack/horizon,bigswitch/horizon,icloudrnd/automation_tools,icloudrnd/automation_tools,xinwu/horizon,yeming233/horizon,yeming233/horizon,vladryk/horizon,eayunstack/horizon,Mirantis/mos-horizon,agileblaze/OpenStackTwoFactorAuthentication,philoniare/horizon,xme1226/horizon,Metaswitch/horizon,aaronorosen/horizon-congress,ging/horizon,damien-dg/horizon,BiznetGIO/horizon,anthonydillon/horizon,doug-fish/horizon,yeming233/horizon,tqtran7/horizon,mrunge/openstack_horizon,openstack/horizon,bigswitch/horizon,endorphinl/horizon,BiznetGIO/horizon,tsufiev/horizon,VaneCloud/horizon,endorphinl/horizon-fork,icloudrnd/automation_tools,froyobin/horizon,yjxtogo/horizon,redhat-cip/horizon,damien-dg/horizon,Metaswitch/horizon,tsufiev/horizon,RudoCris/horizon,django-leonardo/horizon,liyitest/rr,pranavtendolkr/horizon,endorphinl/horizon-fork,Solinea/horizon,Tesora/tesora-horizon,xme1226/horizon,tqtran7/horizon,xinwu/horizon,gochist/horizon,endorphinl/horizon-fork,coreycb/horizon,mdavid/horizon,takeshineshiro/horizon,NCI-Cloud/horizon,endorphinl/horizon,liyitest/rr,zouyapeng/horizon,newrocknj/horizon,blueboxgroup/horizon,dan1/horizon-proto,watonyweng/horizon,redhat-cip/horizon,Dark-Hacker/horizon,flochaz/horizon,RudoCris/horizon,wangxiangyu/horizon,Mirantis/mos-horizon,nvoron23/avos,sandvine/horizon,ChameleonCloud/horizon,spring-week-topos/horizon-week,mrunge/horizon,maestro-hybrid-cloud/horizon,promptworks/horizon,kfox1111/horizon,yjxtogo/horizon,flochaz/horizon,agileblaze/OpenStackTwoFactorAuthentication,anthonydillon/horizon,openstack/horizon,Hodorable/0602,idjaw/horizon,dan1/horizon-x509,dan1/horizon-x509,Hodorable/0602,django-leonardo/horizon,yanheven/console,mandeepdhami/horizon,luhanhan/horizon,spring-week-topos/horizon-week,gerrive/horizon,davidcusatis/horizon,tsufiev/horizon,NCI-Cloud/horizon,Mirantis/mos-horizon,noironetworks/horizon,mrunge/horizon_lib,eayunstack/horizon,izadorozhna/dashboard_integration_tests,tellesnobrega/horizon,doug-fish/horizon,mandeepdhami/horizon,doug-fish/horizon,VaneCloud/horizon,ChameleonCloud/horizon,idjaw/horizon,idjaw/horizon,tanglei528/horizon,FNST-OpenStack/horizon,davidcusatis/horizon,Tesora/tesora-horizon,wolverineav/horizon,vladryk/horizon,dan1/horizon-proto,JioCloud/horizon,JioCloud/horizon,henaras/horizon,bac/horizon,aaronorosen/horizon-congress,pranavtendolkr/horizon,nvoron23/avos,spring-week-topos/horizon-week,sandvine/horizon,CiscoSystems/avos,gerrive/horizon,mrunge/horizon,Solinea/horizon,liyitest/rr,saydulk/horizon,mrunge/openstack_horizon,vladryk/horizon,watonyweng/horizon,aaronorosen/horizon-congress,nvoron23/avos,openstack/horizon,promptworks/horizon,gerrive/horizon,idjaw/horizon,dan1/horizon-proto,tanglei528/horizon,coreycb/horizon,nvoron23/avos,newrocknj/horizon,tellesnobrega/horizon,maestro-hybrid-cloud/horizon