Always re-arm the cursor hide timeout on movement (fixes: #3915)

At least with X11, the mouse may move without changing coordinates.
We need to re-arm the cursor hide timeout since the cursor was shown.
(cherry picked from commit ac6b127e)

src/video_output/display.c

@@ -459,15 +459,12 @@ static void VoutDisplayEventMouse(vout_display_t *vd, int event, va_list args)
     case VOUT_DISPLAY_EVENT_MOUSE_MOVED: {
         const int x = (int)va_arg(args, int);
         const int y = (int)va_arg(args, int);
-        if (x != osys->mouse.state.i_x || y != osys->mouse.state.i_y) {
+
         //msg_Dbg(vd, "VoutDisplayEvent 'mouse' @%d,%d", x, y);
 
         m.i_x = x;
         m.i_y = y;
         m.b_double_click = false;
-        } else {
-            is_ignored = true;
-        }
         break;
     }
     case VOUT_DISPLAY_EVENT_MOUSE_PRESSED: