refactoring: UI squawk now belongs to a new class, it enables me doing trayed mode, when main window is destroyed

ui/dialogqueue.h

@@ -1,91 +0,0 @@
-// Squawk messenger.
-// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-#ifndef DIALOGQUEUE_H
-#define DIALOGQUEUE_H
-
-#include <QObject>
-#include <QInputDialog>
-
-#include <boost/multi_index_container.hpp>
-#include <boost/multi_index/ordered_index.hpp>
-#include <boost/multi_index/sequenced_index.hpp>
-
-#include <ui/widgets/accounts/credentialsprompt.h>
-
-class Squawk;
-
-class DialogQueue : public QObject
-{
-    Q_OBJECT
-public:
-    enum Action {
-        none,
-        askPassword,
-        askCredentials
-    };
-
-    DialogQueue(Squawk* squawk);
-    ~DialogQueue();
-
-    bool addAction(const QString& source, Action action);
-    bool cancelAction(const QString& source, Action action);
-
-private:
-    void performNextAction();
-    void actionDone();
-
-private slots:
-    void onPropmtAccepted();
-    void onPropmtRejected();
-
-private:
-    QString currentSource;
-    Action currentAction;
-
-    struct ActionId {
-    public:
-        ActionId(const QString& p_source, Action p_action);
-        ActionId(const ActionId& other);
-
-        const QString source;
-        const Action action;
-
-        bool operator < (const ActionId& other) const;
-    };
-
-    typedef boost::multi_index_container <
-        ActionId,
-        boost::multi_index::indexed_by <
-            boost::multi_index::ordered_unique <
-                boost::multi_index::identity <ActionId>
-            >,
-            boost::multi_index::sequenced<>
-        >
-    > Queue;
-
-    typedef Queue::nth_index<0>::type Collection;
-    typedef Queue::nth_index<1>::type Sequence;
-
-    Queue queue;
-    Collection& collection;
-    Sequence& sequence;
-
-    QDialog* prompt;
-    Squawk* squawk;
-};
-
-#endif // DIALOGQUEUE_H