Qt: fix hovering text of the playlist button.

Close #5948

modules/gui/qt4/components/controller.hpp

@@ -124,7 +124,7 @@ static const char* const tooltipL[BUTTON_MAX] = { I_PLAY_TOOLTIP,
     N_("Previous media in the playlist, skip backward when keep-pressed"),
     N_("Next media in the playlist, skip forward when keep-pressed"), N_("Slower"), N_("Faster"),
     N_("Toggle the video in fullscreen"), N_("Toggle the video out fullscreen"),
-    N_("Show extended settings" ), N_( "Show playlist" ),
+    N_("Show extended settings" ), N_( "Toggle playlist" ),
     N_( "Take a snapshot" ), N_( "Record" ),
     N_( "Loop from point A to point B continuously." ), N_("Frame by frame"),
     N_("Reverse"), N_("Step backward"), N_("Step forward"), N_("Quit"),