sw content controls: add ODT export

Wrap the text portions inside the content control in a
<loext:content-control> XML element. Also map the (so far) single UNO
property of it to <loext:content-control
loext:showing-place-holder="...">.

This is just initial export for inline text content controls, more
properties are to be added in follow-up commits.

Change-Id: I5d928255b925ed7e08fb635ba39f546e9a4879de
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132717
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions