Desktop mode: don't display on 2nd screen if multiscreen mode is deactivated

src/core/UBApplicationController.cpp

@@ -721,6 +721,13 @@ void UBApplicationController::importFile(const QString& pFilePath)
 
 void UBApplicationController::useMultiScreen(bool use)
 {
+    if (use && !mMirror)
+        mMirror = new UBScreenMirror();
+    if (!use && mMirror) {
+        delete mMirror;
+        mMirror = NULL;
+    }
+
     mDisplayManager->setUseMultiScreen(use);
     mDisplayManager->adjustScreens(0);
     UBSettings::settings()->appUseMultiscreen->set(use);

src/core/UBDisplayManager.cpp

@@ -55,7 +55,7 @@ UBDisplayManager::UBDisplayManager(QObject *parent)
 {
     mDesktop = qApp->desktop();
 
-    mUseMultiScreen = true;
+    mUseMultiScreen = UBSettings::settings()->appUseMultiscreen->get().toBool();
 
     initScreenIndexes();