sw floattable: remove empty follow flys on follow table removal

- add a SwRootFrame::DeleteEmptyFlys_(), which can delete empty flys and
invalidate the anchors, so the necessary text frame joins and page frame
deletions happen

- add a SwRootFrame::InsertEmptyFly(), which can build a to-delete list for
DeleteEmptyFlys_()

- add a SwFlyAtContentFrame::DelEmpty(), which can call InsertEmptyFly()
for one empty fly frame

- in SwTabFrame::Cut(), call DelEmpty() on the fly parent, similar to how we do
it for sections

- in SwLayAction::InternalAction(), call DeleteEmptyFlys() to actually delete
the unnecessary fly frames

Change-Id: I8d3b4ee2c07b60d6187059bb177c56a129810750
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/149815
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions