recalculate unrad count incases some not read

lib/models/profile.dart

@@ -120,6 +120,10 @@ class ProfileInfoState extends ChangeNotifier {
     notifyListeners();
   }
 
+  void recountUnread() {
+    this._unreadMessages = _contacts.contacts.fold(0, (i, c) => i + c.unreadMessages);
+  }
+
   // Remove a contact from a list. Currently only used when rejecting a group invitation.
   // Eventually will also be used for other removals.
   void removeContact(String handle) {
@@ -168,6 +172,7 @@ class ProfileInfoState extends ChangeNotifier {
                 lastMessageTime: DateTime.fromMillisecondsSinceEpoch(1000 * int.parse(contact["lastMsgTime"])),
               ));
         }
+        unreadMessages += int.parse(contact["numUnread"]);
       });
     }
     this._contacts.resort();

lib/views/contactsview.dart

@@ -81,6 +81,7 @@ class _ContactsViewState extends State<ContactsView> {
               icon: Icon(Icons.arrow_back),
               tooltip: MaterialLocalizations.of(context).backButtonTooltip,
               onPressed: () {
+                Provider.of<ProfileInfoState>(context, listen: false).recountUnread();
                 Provider.of<AppState>(context, listen: false).selectedProfile = "";
                 Navigator.of(context).pop();
               },

lib/widgets/profilerow.dart

@@ -1,6 +1,7 @@
 import 'package:cwtch/models/appstate.dart';
 import 'package:cwtch/models/contactlist.dart';
 import 'package:cwtch/models/profile.dart';
+import 'package:cwtch/models/profilelist.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:cwtch/views/addeditprofileview.dart';
@@ -83,7 +84,6 @@ class _ProfileRowState extends State<ProfileRow> {
   }
 
   void _pushContactList(ProfileInfoState profile, bool isLandscape) {
-    Provider.of<ProfileInfoState>(context, listen: false).unreadMessages = 0;
     Navigator.of(context).push(
       MaterialPageRoute<void>(
         settings: RouteSettings(name: "conversations"),