Fix: Opening the casebook while editing a room (only possible via keyboard shortcut) and then canceling the confirmation window resulted in keyboard scrolling no longer working. (still TODO: Fix window being "there" but not visible during confirmation dialog)

git-svn-id: http://corsix-th.googlecode.com/svn/trunk@1870 c39591fa-788f-11de-a72b-d90af8dea425