2021-01-06-added-sw-confirm-modal.md

title	issue
Added sw-confirm-modal and added sw-one-to-many-grid functionality	NEXT-12514

Administration

• Added new default component sw-confirm-modal as new solution for very common confirm modal situations
• Added deleteItems and deleteItemsFinish methods to sw-one-to-many-grid like it is already implemented in sw-entity-listing to easily delete the selected grid elements
• Changed deleteItems method of sw-entity-listing to delete every entry in one request instead of one for each