A subpage
Alike T40. Here 'lockPosition' is set to blank and 'yPosOffset' set accordingly. This makes the menu 'slide' with the vertical movement of the cursor.
Also the menu items in GMENU_LAYERS are made into a vertical menu.
page - pageT10 - pageT11 - pageT12 - pageT21 - pageT22 - pageT23 - pageT24 - pageT30 - pageT40 - pageT41 - pageT42 - pageT43 - pageT44 - pageT50 - pageT51
