Toast fixes/refactoring (#4289)

* Memoize Toast functions
* Rename Toast.success to Toast.toast, add new Toast.success
* Disable prefer-destructuring on AssignmentExpression

ui/v2.5/src/components/Scenes/SceneListTable.tsx

@@ -77,7 +77,6 @@ export const SceneListTable: React.FC<ISceneListTableProps> = (
               onClick={(
                 event: React.MouseEvent<HTMLInputElement, MouseEvent>
               ) => {
-                // eslint-disable-next-line prefer-destructuring
                 shiftKey = event.shiftKey;
                 event.stopPropagation();
               }}