Qt, menu: split the subtitle menu from video menu

This is one of the most used function, and thus makes it faster to
activate

modules/gui/qt4/menus.cpp

@@ -581,7 +581,7 @@ QMenu *QVLCMenu::AudioMenu( intf_thread_t *p_intf, QMenu * current )
 }
 
 /* Subtitles */
-void QVLCMenu::SubMenu( intf_thread_t *p_intf, QMenu *current )
+QMenu *QVLCMenu::SubMenu( intf_thread_t *p_intf, QMenu *current )
 {
     QAction *action;
     QMenu *submenu = new QMenu( qtr( "&Subtitles Track" ), current );
@@ -590,6 +590,7 @@ void QVLCMenu::SubMenu( intf_thread_t *p_intf, QMenu *current )
     addDPStaticEntry( submenu, qtr( "Open File..." ), "",
                       SLOT( loadSubtitlesFile() ) );
     submenu->addSeparator();
+    return submenu;
 }
 
 /**
@@ -965,11 +966,13 @@ void QVLCMenu::PopupMenu( intf_thread_t *p_intf, bool show )
 
         /* Video menu */
         submenu = new QMenu( menu );
-        action = menu->addMenu( VideoMenu( p_intf, submenu ) );
+        action = menu->addMenu( VideoMenu( p_intf, submenu, false ) );
         action->setText( qtr( "&Video" ) );
         if( action->menu()->isEmpty() )
             action->setEnabled( false );
 
+        SubMenu( p_intf, menu )->setTitle( qtr( "Subti&tle") );
+
         /* Playback menu for chapters */
         submenu = new QMenu( menu );
         action = menu->addMenu( NavigMenu( p_intf, submenu ) );

modules/gui/qt4/menus.hpp

@@ -113,7 +113,7 @@ private:
     static QMenu *VideoMenu( intf_thread_t *p_intf, QWidget *parent ) {
         return VideoMenu( p_intf, new QMenu( parent ) );
     }
-    static void SubMenu(intf_thread_t *p_intf, QMenu *current);
+    static QMenu *SubMenu(intf_thread_t *p_intf, QMenu *current);
 
     static QMenu *AudioMenu( intf_thread_t *, QMenu * );
     static QMenu *AudioMenu( intf_thread_t *p_intf, QWidget *parent ) {