Add context menu for status action notifications

Tusker/Screens/Utilities/Previewing.swift

@@ -69,6 +69,13 @@ extension MenuPreviewProvider {
         ]
     }
     
+    func actionsForNotificationGroup(_ group: NotificationGroup) -> [UIAction] {
+//        let notifications = group.notificationIDs.compactMap(MastodonCache.notification(for:))
+        return [
+            // todo: clear notifications option
+        ]
+    }
+
     private func createAction(identifier: String, title: String, systemImageName: String, handler: @escaping UIActionHandler) -> UIAction {
         return UIAction(title: title, image: UIImage(systemName: systemImageName), identifier: UIAction.Identifier(identifier), discoverabilityTitle: nil, attributes: [], state: .off, handler: handler)
     }

Tusker/Views/Notifications/ActionNotificationGroupTableViewCell.swift

@@ -155,9 +155,22 @@ class ActionNotificationGroupTableViewCell: UITableViewCell {
         
         if selected {
             let notifications = group.notificationIDs.compactMap(MastodonCache.notification(for:))
-            let accountIDs = notifications.compactMap { $0.account.id }
+            let accountIDs = notifications.map { $0.account.id }
             delegate?.showStatusActionAccountList(statusID: statusID, accountIDs: accountIDs, action: notifications.first!.kind)
         }
     }
-
+    
+}
+
+extension ActionNotificationGroupTableViewCell: MenuPreviewProvider {
+    
+    func getPreviewProviders(for location: CGPoint, sourceViewController: UIViewController) -> PreviewProviders? {
+        return (content: {
+            let accountIDs = self.group.notificationIDs.compactMap(MastodonCache.notification(for:)).map { $0.account.id }
+            return StatusActionAccountListTableViewController(statusID: self.statusID, accountIDs: accountIDs)
+        }, actions: {
+            return self.actionsForNotificationGroup(self.group)
+        })
+    }
+    
 }