modify list.update function

- modify list.update function
modify user.update function

- modify user.update function
modify & update & add

- save listName to session to show which list is showing
- implement show-all-items function
- implement edit-user function
- implement edit-list function
- modify view-list function
update & modify

- add script to show the initial category of the selected item
add header to show listName

- add header to show listName
update & modify

- add a list header
- add edit-list modal structure
- add script to support edit-list function
add edit-user modal and script functions

- add edit-user modal struture
- add script to support edit-list function