Use QMetaObject::invokeMethod instead of signal-slot hack.

src/plugins/projectexplorer/allprojectsfilter.cpp

@@ -71,8 +71,5 @@ void AllProjectsFilter::updateFiles()
 void AllProjectsFilter::refresh(QFutureInterface<void> &future)
 {
     Q_UNUSED(future);
-    // invokeAsyncronouslyOnGuiThread
-    connect(this, SIGNAL(invokeRefresh()), this, SLOT(markFilesAsOutOfDate()));
-    emit invokeRefresh();
-    disconnect(this, SIGNAL(invokeRefresh()), this, SLOT(markFilesAsOutOfDate()));
+    QMetaObject::invokeMethod(this, "markFilesAsOutOfDate", Qt::BlockingQueuedConnection);
 }

src/plugins/projectexplorer/allprojectsfilter.h

@@ -58,8 +58,6 @@ protected:
 
 private slots:
     void markFilesAsOutOfDate();
-signals:
-    void invokeRefresh();
 private:
     ProjectExplorerPlugin *m_projectExplorer;
     bool m_filesUpToDate;

src/plugins/projectexplorer/currentprojectfilter.cpp

@@ -88,8 +88,5 @@ void CurrentProjectFilter::currentProjectChanged(ProjectExplorer::Project *proje
 void CurrentProjectFilter::refresh(QFutureInterface<void> &future)
 {
     Q_UNUSED(future);
-    // invokeAsyncronouslyOnGuiThread
-    connect(this, SIGNAL(invokeRefresh()), this, SLOT(markFilesAsOutOfDate()));
-    emit invokeRefresh();
-    disconnect(this, SIGNAL(invokeRefresh()), this, SLOT(markFilesAsOutOfDate()));
+    QMetaObject::invokeMethod(this, "markFilesAsOutOfDate", Qt::BlockingQueuedConnection);
 }

src/plugins/projectexplorer/currentprojectfilter.h

@@ -63,9 +63,6 @@ private slots:
     void currentProjectChanged(ProjectExplorer::Project *project);
     void markFilesAsOutOfDate();
 
-signals:
-    void invokeRefresh();
-
 private:
 
     ProjectExplorerPlugin *m_projectExplorer;

src/plugins/quickopen/opendocumentsfilter.cpp

@@ -83,10 +83,7 @@ void OpenDocumentsFilter::refreshInternally()
 void OpenDocumentsFilter::refresh(QFutureInterface<void> &future)
 {
     Q_UNUSED(future);
-    // invokeAsyncronouslyOnGuiThread
-    connect(this, SIGNAL(invokeRefresh()), this, SLOT(refreshInternally()));
-    emit invokeRefresh();
-    disconnect(this, SIGNAL(invokeRefresh()), this, SLOT(refreshInternally()));
+    QMetaObject::invokeMethod(this, "refreshInternally", Qt::BlockingQueuedConnection);
 }
 
 void OpenDocumentsFilter::accept(FilterEntry selection) const

src/plugins/quickopen/opendocumentsfilter.h

@@ -59,8 +59,7 @@ public:
 
 public slots:
     void refreshInternally();
-signals:
-    void invokeRefresh();
+
 private:
     Core::EditorManager *m_editorManager;