changed the view level commands to the following:
	- view level increase: increase the view level by one
	- view level decrease: decrease the view level by one
	- view level set: set the view level to a specified level
changed the jump up command not to take a level parameter
- added a prompt everytime the system wants the user to enter an address
- fixed bug where the default filename in save file was not correct for
  cloned documents.