Use invokeMethod instead of single shot timer with 0 timeout

Refactor it in coreplugin.

Change-Id: I6aaad1b9270a8ff8a4a0bea6a1fff806b2fe190b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/cppeditor/cppminimizableinfobars.cpp

@@ -27,7 +27,6 @@
 
 #include "cppeditorconstants.h"
 
-#include <QTimer>
 #include <QToolButton>
 
 #include <cpptools/cpptoolssettings.h>
@@ -142,10 +141,8 @@ static InfoBarEntry createMinimizableInfo(const Id &id,
     // The minimizer() might delete the "Minimize" button immediately and as
     // result invalid reads will happen in QToolButton::mouseReleaseEvent().
     // Avoid this by running the minimizer in the next event loop iteration.
-    info.setCustomButtonInfo(MinimizableInfoBars::tr("Minimize"), [=](){
-        QTimer::singleShot(0, [=] {
-            minimizer();
-        });
+    info.setCustomButtonInfo(MinimizableInfoBars::tr("Minimize"), [minimizer] {
+        QMetaObject::invokeMethod(settings(), [minimizer] { minimizer(); }, Qt::QueuedConnection);
     });
 
     return info;