bug fix in item_table_stack

should create a new one for each menu widget invoke
add show_parent to menu widget
use show_parent in reader.lua
add show_parent in readermenu
remove debug information
remove debug information
remove LvDEBUG call
Merge pull request #807 from houqp/new_ui_code

bug fix and touch enhancement to old menu widget
Merge pull request #808 from houqp/new_ui_houqp

add callback to touchmenu icon