Update invites in the UI after sync

include/Cache.h

@@ -137,6 +137,7 @@ public:
         std::vector<std::string> joinedRooms();
 
         QMap<QString, RoomInfo> roomInfo(bool withInvites = true);
+        std::map<QString, bool> invites();
 
         //! Calculate & return the name of the room.
         QString getRoomName(lmdb::txn &txn, lmdb::dbi &statesdb, lmdb::dbi &membersdb);

include/RoomInfoListItem.h

@@ -129,6 +129,8 @@ public:
                         roomType_ = RoomType::Joined;
         }
 
+        bool isInvite() { return roomType_ == RoomType::Invited; }
+
 signals:
         void clicked(const QString &room_id);
         void leaveRoom(const QString &room_id);

include/RoomList.h

@@ -56,6 +56,7 @@ public:
         void setFilterRooms(bool filterRooms);
         void setRoomFilter(std::vector<QString> room_ids);
         void updateRoom(const QString &room_id, const RoomInfo &info);
+        void cleanupInvites(const std::map<QString, bool> &invites);
 
 signals:
         void roomChanged(const QString &room_id);