MainApplication: Sync settings after writing isRunning value

Fixes correctly detecting crashes during session restore.

src/lib/app/mainapplication.cpp

@@ -291,6 +291,7 @@ MainApplication::MainApplication(int &argc, char** argv)
         settings.setValue(QSL("isRunning"), true);
         settings.setValue(QSL("isRestoring"), wasRunning);
         settings.endGroup();
+        settings.sync();
 
         m_isStartingAfterCrash = wasRunning && wasRestoring;
 

src/lib/app/settings.cpp

@@ -76,6 +76,11 @@ void Settings::endGroup()
     s_settings->endGroup();
 }
 
+void Settings::sync()
+{
+    s_settings->sync();
+}
+
 QSettings* Settings::globalSettings()
 {
     return s_settings;

src/lib/app/settings.h

@@ -47,6 +47,8 @@ public:
     void beginGroup(const QString &prefix);
     void endGroup();
 
+    void sync();
+
 private:
     static QSettings* s_settings;
     static QzSettings* s_qzSettings;