LPS-44429 Add and update usually using the same method making code simplier
LPS-44429 Source format

Conflicts:
	portal-impl/src/com/liferay/portlet/layoutsadmin/action/EditExportConfigurationAction.java
LPS-44429 delete method in helper - although matches into the helper's add and update pattern - does not add here any helper value, moving to action class

Conflicts:
	portal-impl/src/com/liferay/portlet/layoutsadmin/action/EditExportConfigurationAction.java
LPS-44429 Source format and simplify
LPS-44429 Move out configuration section - makes export_layouts.jsp a bit easier to maintain allows reuse of configuration screen

Conflicts:
	portal-web/docroot/html/portlet/layouts_admin/export_layouts.jsp
LPS-44429 Renaming, no logic change
LPS-44429 Moving logic to the factory, no logic change
LPS-44429 Persist the state through page refreshes

Conflicts:
	portal-impl/src/com/liferay/portlet/layoutsadmin/action/EditExportConfigurationAction.java
LPS-44429 Run ant format-source
LPS-44429 Generated