It was quite confusing that the implementation class for SwView is
SwView_Impl, but SwViewShell's implementation class was SwViewImp.

Change-Id: I44fdc79f446a576b3d9b952b0c9212001b0b88fe
Reviewed-on: https://gerrit.libreoffice.org/14681Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>