Ensure that the printing temp selection document is not destroyed
prematurely by SwXTextView::NotifySelChanged, called via
ViewOptionAdjustStop, by retaining the temp doc object shell not
at the View but in SwRenderData.

Not restoring the view options for selections does not actually work,
because having a selection surprisingly does not imply printing a
temp document: the preview also uses a selection.
(view option regression from cd690d2e)