Add global state persistance methods
Add global state persistance methods

wso2/carbon-dashboards,lasanthaS/carbon-dashboards,ksdperera/carbon-dashboards,lasanthaS/carbon-dashboards,wso2/carbon-dashboards,ksdperera/carbon-dashboards,dilini-muthumala/carbon-dashboards,dilini-muthumala/carbon-dashboards,dilini-muthumala/carbon-dashboards,lasanthaS/carbon-dashboards,ksdperera/carbon-dashboards