Fix poller unable to start when approving group invite (#888)

app/src/main/java/org/thoughtcrime/securesms/groups/GroupManagerV2Impl.kt

@@ -638,6 +638,14 @@ class GroupManagerV2Impl @Inject constructor(
             "Our account ID is not available"
         }
 
+        // Clear the invited flag of the group in the config
+        configFactory.withMutableUserConfigs { configs ->
+            configs.userGroups.set(group.copy(
+                invited = false,
+                joinedAtSecs = TimeUnit.MILLISECONDS.toSeconds(clock.currentTimeMills())
+            ))
+        }
+
         val poller = checkNotNull(pollerFactory.pollerFor(group.groupAccountId)) { "Unable to start a poller for groups " }
         poller.start()
 
@@ -649,13 +657,6 @@ class GroupManagerV2Impl @Inject constructor(
                 .filter { it.hadAtLeastOneSuccessfulPoll }
                 .first()
         }
-        // Clear the invited flag of the group in the config
-        configFactory.withMutableUserConfigs { configs ->
-            configs.userGroups.set(group.copy(
-                invited = false,
-                joinedAtSecs = TimeUnit.MILLISECONDS.toSeconds(clock.currentTimeMills())
-            ))
-        }
 
         if (group.adminKey == null) {
             // Send an invite response to the group if we are invited as a regular member