Themed Icons: Introduce Utils::Icon

Instead of describing icons via file name or in the themed icons case
via
a string that is a list of mask/color pairs, we have now a class for it.

Icons are now listed in per-plugin *icons.h headers.

RunControl::m_icon was The only place left where an icon property was in
fact a string. This patch changes that member to be a Utils::Icon.

Change-Id: Ibcfa8bb25e6d2e330c567ee7ccc0b97ead603177
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/libs/utils/utilsicons.h

@@ -0,0 +1,45 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
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+** This file is part of Qt Creator.
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+** Alternatively, this file may be used under the terms of the GNU Lesser
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+****************************************************************************/
+
+#ifndef UTILSICONS_H
+#define UTILSICONS_H
+
+#include "icon.h"
+
+namespace Utils {
+namespace Icons {
+
+const Utils::Icon EDIT_CLEAR({
+        {QLatin1String(":/core/images/editclear.png"), Utils::Theme::BackgroundColorHover}}, Utils::Icon::Style::Tinted);
+
+} // namespace Icons
+} // namespace Utils
+
+#endif // UTILSICONS_H