NXP-15206: Add new import icon for import button - from ionicons
NXP-14992: remove advanced and simple search related contributions
NXP-15053: move 'search_listing_ajax' layout to nuxeo-search-ui
NXP-14992: remove advanced search local configuration test
NXP-15010: add selectManyCheckboxUserAggregate widgetType
NXP-15010: add contentView searchLayout widget control insert
NXP-14992: add back DocumentSearchActions for compat, and deprecate it
NXP-14992: add back search widgets