LPS-38524 Add export and import actions to global site
LPS-38524 Include layouts admin main.js in site admin portlet
LPS-38524 Hide application configuration and content options if they are empty in import layouts
LPS-38524 Hide page options in export and import layouts when site is global
LPS-38524 Exclude portlets without configuration options from application list in import layouts
LPS-38524 Remove redundant checking
LPS-38524 Make the var names consistent with the internal var in ManifestSummary
LPS-37346 Fix error in modules.js