Fix filtering timelines (#2214)

app/src/main/java/com/keylesspalace/tusky/components/timeline/TimelineViewModel.kt

@@ -451,9 +451,9 @@ class TimelineViewModel @Inject constructor(
             } else {
                 throw HttpException(response)
             }
-        }
+        }.toMutableList()
 
-        filterStatuses(statuses.toMutableList())
+        filterStatuses(statuses)
 
         return statuses
     }
@@ -530,7 +530,7 @@ class TimelineViewModel @Inject constructor(
         if (statuses.size > 1) {
             clearPlaceholdersForResponse(mutableStatusResponse)
             this.statuses.clear()
-            this.statuses.addAll(statuses.toViewData())
+            this.statuses.addAll(mutableStatusResponse.toViewData())
         }
     }