Fix update followed/following prunes no longer followed people initiated from outside app

lib/services/connections_manager.dart

@@ -39,7 +39,7 @@ class ConnectionsManager extends ChangeNotifier {
         );
   }
 
-  bool addAllConnections(Iterable<Connection> newConnections) {
+  bool upsertAllConnections(Iterable<Connection> newConnections) {
     newConnections.forEach(upsertConnection);
     return true;
   }
@@ -144,11 +144,13 @@ class ConnectionsManager extends ChangeNotifier {
     final results = <String, Connection>{};
     var moreResults = true;
     var maxId = -1;
-    const limit = 200;
+    const limit = 50;
     var currentPage = PagingData(limit: limit);
+    final originalContacts = conRepo.getMyContacts().toSet();
     while (moreResults) {
       await client.getMyFollowers(currentPage).match(onSuccess: (followers) {
         for (final f in followers.data) {
+          originalContacts.remove(f);
           results[f.id] = f.copy(status: ConnectionStatus.theyFollowYou);
           int id = int.parse(f.id);
           maxId = max(maxId, id);
@@ -167,6 +169,7 @@ class ConnectionsManager extends ChangeNotifier {
     while (moreResults) {
       await client.getMyFollowing(currentPage).match(onSuccess: (following) {
         for (final f in following.data) {
+          originalContacts.remove(f);
           if (results.containsKey(f.id)) {
             results[f.id] = f.copy(status: ConnectionStatus.mutual);
           } else {
@@ -184,7 +187,11 @@ class ConnectionsManager extends ChangeNotifier {
       });
     }
 
-    addAllConnections(results.values);
+    for (final noLongerFollowed in originalContacts) {
+      results[noLongerFollowed.id] =
+          noLongerFollowed.copy(status: ConnectionStatus.none);
+    }
+    upsertAllConnections(results.values);
     final myContacts = conRepo.getMyContacts().toList();
     myContacts.sort((c1, c2) => c1.name.compareTo(c2.name));
     _logger.fine('# Contacts:${myContacts.length}');