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/fancylineedit.cpp

@@ -33,8 +33,8 @@
 #include "historycompleter.h"
 #include "hostosinfo.h"
 #include "qtcassert.h"
-#include "themehelper.h"
 #include "stylehelper.h"
+#include "utilsicons.h"
 
 #include <QAbstractItemView>
 #include <QDebug>
@@ -365,9 +365,7 @@ void FancyLineEdit::setFiltering(bool on)
                          QLatin1String("edit-clear-locationbar-rtl") :
                          QLatin1String("edit-clear-locationbar-ltr"),
                          QIcon::fromTheme(QLatin1String("edit-clear"),
-                                          ThemeHelper::recoloredPixmap(
-                                              QLatin1String(":/core/images/editclear.png"),
-                                              ThemeHelper::inputfieldIconColor())));
+                                          Icons::EDIT_CLEAR.pixmap()));
 
         setButtonPixmap(Right, icon.pixmap(16));
         setButtonVisible(Right, true);