Extract a fading indicator widget into utils

That can show either a pixmap, or some text.
Used for the wrap indicator when searching, and for the 'presentation
mode' of action manager.

Change-Id: I4d603fb5750d7539c50de7ef8fd6c8545293d5b9
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/libs/utils/fadingindicator.h

@@ -0,0 +1,50 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company.  For licensing terms and
+** conditions see http://www.qt.io/terms-conditions.  For further information
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+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
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+**
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+****************************************************************************/
+
+
+#ifndef FADINGINDICATOR_H
+#define FADINGINDICATOR_H
+
+#include "utils_global.h"
+
+#include <QString>
+#include <QWidget>
+
+namespace Utils {
+namespace FadingIndicator {
+
+QTCREATOR_UTILS_EXPORT void showText(QWidget *parent, const QString &text);
+QTCREATOR_UTILS_EXPORT void showPixmap(QWidget *parent, const QString &pixmap);
+
+} // FadingIndicator
+} // Utils
+
+#endif // FADINGINDICATOR_H
+