Replace all calls looking like
  ADialog(some params).Execute()
by
  ScopedVclPtrInstance<ADialog>::Create(some parms)->Execute()

Change-Id: I0b6f0a9ea5ef0a749ffa30ce131e9dc989604639
Reviewed-on: https://gerrit.libreoffice.org/15915Tested-by: Jenkins <ci@libreoffice.org>
Tested-by: Michael Meeks <michael.meeks@collabora.com>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>