tdf#151658 sw: accept of row deletions with nested tables

Accepting tracked row deletion didn't delete the table row,
only its row content, if the table row contained cell
starting nested tables.

Extend SwTableBox::IsEmpty() to detect a table cell as empty,
if it contains only a cell starting empty table.

Note: Without change tracking, deleting content of a selected
table cell leaves the cell starting nested table in
the cell, but deleting row removed the row with nested table,
too.

Follow-up to commit 6383362999b72160eab6abdfc6ea6bdbd231b100
"tdf#151657 sw: delete row with nested table in Hide Changes" and
commit c809867f3ee92a8eb36cbab840bd6d6c5b3b1c26
"tdf#150976 sw: fix tracked deletion of row with nested table".

Change-Id: I9c9bc3b97653b63e797e1e9dd545809b77a02c76
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/142384
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>

0 files changed, 0 insertions, 0 deletions