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/shared/help/bookmarkmanager.cpp

@@ -29,6 +29,7 @@
 ****************************************************************************/
 
 #include "bookmarkmanager.h"
+#include "helpicons.h"
 
 #include <localhelpmanager.h>
 
@@ -579,7 +580,7 @@ Qt::ItemFlags BookmarkModel::flags(const QModelIndex &index) const
 
 BookmarkManager::BookmarkManager()
     : m_folderIcon(QApplication::style()->standardIcon(QStyle::SP_DirClosedIcon))
-    , m_bookmarkIcon(QLatin1String(":/help/images/bookmark.png"))
+    , m_bookmarkIcon(Help::Icons::BOOKMARK.icon())
     , treeModel(new BookmarkModel(0, 1, this))
     , listModel(new BookmarkModel(0, 1, this))
 {