debugger: make the option to write timestamps to the log persistent

src/plugins/debugger/debuggerplugin.cpp

@@ -364,6 +364,7 @@ QWidget *CommonOptionsPage::createPage(QWidget *parent)
         m_ui.spinBoxMaximalStackDepth);
     m_group.insert(theDebuggerAction(ShowStdNamespace), 0);
     m_group.insert(theDebuggerAction(ShowQtNamespace), 0);
+    m_group.insert(theDebuggerAction(LogTimeStamps), 0);
 
 #ifdef USE_REVERSE_DEBUGGING
     m_ui.checkBoxEnableReverseDebugging->hide();