Both frame toolbars and the ribbon's Arrange group now offer the two
run-through entries; they are one wrap mode, told apart by inFront.
Picking any mode by hand drops the offsets and the coordinate system
they were measured in (droppedFrameAttrs), so a page-placed frame set
to a side wrap no longer exports page-relative coordinates for a
paragraph-relative offset.
A frame out of the flow has no text position to re-anchor to, so the
drag adds the pointer delta to its own offsets (startFreeMove).
Steffen Becker
5b287ef57b