LPS-34440 Convert the Add Application part to using panels rather than just styling the sections as panels
LPS-34443 Refactor and rewrite incremental search for applications
LPS-34443 Move add portlet from layout_configuration to dockbar_add_content
LPS-34443 Create vars for duplicated strings
LPS-34440 Move drag and drop from layout_configuration to dockbar_add_content
LPS-34440 Add a new 'add' button to add content or portlets directly to the page
LPS-34440 Use the same method to add contents and add applications in js