debugger: save state of the 'AutoDerefPointers' option

src/plugins/debugger/debuggeractions.cpp

@@ -239,6 +239,7 @@ DebuggerSettings *DebuggerSettings::instance()
     item->setText(tr("Dereference Pointers Automatically"));
     item->setCheckable(true);
     item->setDefaultValue(true);
+    item->setSettingsKey(debugModeGroup, QLatin1String("AutoDerefPointers"));
     item->setToolTip(tr("This switches the Locals&Watchers view to "
         "automatically dereference pointers. This saves a level in the "
         "tree view, but also loses data for the now-missing intermediate "