add & modify

- add listType to session in order to show (hide) 'save' button
- add system generate-list function (random)
- add save-list function
- modify itemList to itemIdList & itemNameList in add-to-list function
add & modify

- add generat-list-by-rule function
- modify generate-list modal
add & modify

- add 'save' button to save unsaved list
- add save-list dialog modal
- add script to support save-function
- modify showing attributes of an item
modify show-item design in list panel

- use <label> to show items in a list content
- show message if a list contains no item