Regression from commit 50223ea6
(tdf#98987 sw: add AddVerticalFrameOffsets compat mode, 2016-03-31),
the problem was that vertical position of the shape was wrong after
mouse move, even if we attempted to take fly frames of the paragraph
into account. (Similar situation is when saving and loading the file;
which is much easier to test.)

Fly frames are created as the
text frames is formatted, and then SwTextFrame::CalcBaseOfstForFly() can
calculate the vertical offset correctly. But in the "move with mouse"
case SwToContentAnchoredObjectPosition::CalcPosition() was invoked by
the time the old flys of the text frame were already removed, but the
new ones were not yet added.

Solve the problem by formatting the text frame from
SwAnchoredDrawObject::MakeObjPosAnchoredAtPara() (if any of its validity
flags are set to false) -- this is expected to be safe, as the object
formatter is invoked by SwLayAction::FormatContent(), i.e. there is no
recursive SwFrame::Calc() call here.

Change-Id: I95851874e3da3f50f304421537c6743e04bdfc7b
Reviewed-on: https://gerrit.libreoffice.org/67490Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins