Removing a page erases data of the previous page also

[Saborknight]

Currently removing a page will display the page as blank, but will also claim to be showing the previous page. Even if the previous page has data, it will still show blank. This, of course then leads to that previous page being saved in its blank state, essentially erasing the data of the previous page on removal of the current page.

I think as long as the data of the previous page is loaded into the dialog as soon as the current page is deleted, this should stop this bug from happening.