The previous commit even reset \pagebb at the end of the paragraph,
which is not what the spec says.

Otherwise, max undo steps field gets reset to 100 (?) for inputs > 9999.

This reverts commit 9c1a1076.

this is work is progress, not public...

This reverts commit 3b90a3f1.

Because if not, we may run out of the 16-bit integer space to store
reference count.

This was unnoticed so far as both Writer and Word output \pagebb instead
of \page when exporting page breaks.

There was still not enough space for German traslation