Merge branch 'fix/dm-timeline-streaming' into 'develop'

DM timeline: stream new statuses

Closes #170

See merge request pleroma/pleroma-fe!379

src/modules/statuses.js

@@ -172,6 +172,14 @@ const addNewStatuses = (state, { statuses, showImmediately = false, timeline, us
           sortTimeline(mentions)
         }
       }
+      if (status.visibility === 'direct') {
+        const dms = state.timelines.dms
+
+        mergeOrAdd(dms.statuses, dms.statusesObject, status)
+        dms.newStatusCount += 1
+
+        sortTimeline(dms)
+      }
     }
 
     // Decide if we should treat the status as new for this timeline.