Move UnreadBadge to ui/unread_badge.

Telegram/SourceFiles/ui/unread_badge.h

@@ -0,0 +1,42 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop version of Telegram messaging app, see https://telegram.org
+
+Telegram Desktop 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.
+
+It 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.
+
+In addition, as a special exception, the copyright holders give permission
+to link the code of portions of this program with the OpenSSL library.
+
+Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
+Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
+*/
+#pragma once
+
+#include "ui/rp_widget.h"
+
+namespace Ui {
+
+class UnreadBadge : public RpWidget {
+public:
+	using RpWidget::RpWidget;
+
+	void setText(const QString &text, bool active);
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+
+private:
+	QString _text;
+	bool _active = false;
+
+};
+
+} // namespace Ui