LPS-46012 Remove the application configuration section from the layout staging/export/import screens because we want to always deal with the layout portlets
LPS-46012 Since we always export/import every portlet of a page we do not need to delete portlets from pages when import anymore
LPS-46012 We need to handle layout and site level portlet on the same way
LPS-46012 Separate the logic of calculating the portlet data and portlet setup export/import controls
LPS-46012 Refactor the export/import portlet data flag calculation to make more sense
LPS-46012 Use properly the PORTLET_DATA and PORTLET_DATA_ALL constants
LPS-46012 Reorganizing if statements
LPS-46012 SF
LPS-46012 Sort where it's type="hidden"
LPS-46012 Sort where it's possible