Instead of hardcoding each elements of databaseController.content.treeItemChildren, use the special element @each
Fix the CloudKeePass.TextFieldCopySelectView._rightAccessoryViewDidChange observer.
For a SC.TextFieldView, the rightAccessory attribute is not an object but
a class declaration, so setting an observer on it is invalid and made the
application crash on some situation (mainly when hidding the view containing
the TextFieldCopySelectView)