UBERF-18: add reactions for comments (#3899)

Signed-off-by: Kristina Fefelova <kristin.fefelova@gmail.com>

models/tracker/src/plugin.ts

@@ -13,11 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-
-import { TxViewlet } from '@hcengineering/activity'
 import { Doc, Ref } from '@hcengineering/core'
 import { ObjectSearchCategory, ObjectSearchFactory } from '@hcengineering/model-presentation'
-import { NotificationGroup, NotificationType } from '@hcengineering/notification'
 import { IntlString, Resource, mergeIds } from '@hcengineering/platform'
 import { ProjectType } from '@hcengineering/task'
 import { trackerId } from '@hcengineering/tracker'
@@ -25,6 +22,8 @@ import tracker from '@hcengineering/tracker-resources/src/plugin'
 import type { AnyComponent } from '@hcengineering/ui/src/types'
 import { Action, ViewAction, Viewlet } from '@hcengineering/view'
 import { Application } from '@hcengineering/workbench'
+import { ActivityExtension, TxViewlet } from '@hcengineering/activity'
+import { NotificationGroup, NotificationType } from '@hcengineering/notification'
 
 export default mergeIds(trackerId, tracker, {
   string: {
@@ -75,6 +74,10 @@ export default mergeIds(trackerId, tracker, {
     TxIssueCreated: '' as Ref<TxViewlet>,
     TrackerNotificationGroup: '' as Ref<NotificationGroup>,
     AssigneeNotification: '' as Ref<NotificationType>,
+    IssueActivityExtension: '' as Ref<ActivityExtension>,
+    IssueTemplateActivityExtension: '' as Ref<ActivityExtension>,
+    ComponentActivityExtension: '' as Ref<ActivityExtension>,
+    MilestoneActivityExtension: '' as Ref<ActivityExtension>,
     BaseProjectType: '' as Ref<ProjectType>
   },
   completion: {