PRC-304: update edit to change _copy_ of application, not cached data

[severinbeauvais]

NOTE: contains broken code -- map error when saving application -- Mark to add in necessary init checks

[severinbeauvais]

Test case:

1. go to application list
2. click Create New Application
3. observe that the page title is Create New Application; also, the map displays nothing and the browse, Add Decision/Application Details/Click to Modify/Click to Review buttons are disabled
4. enter a valid Disposition ID and click Fetch Disposition Data
5. click Create button
6. observe that the page title is Edit Application; also, the map displays the feature(s) and the buttons listed above are enabled
7. click Save button --> this is where the error occurs (when there is no try-catch code)