LOK: Navigator: fix expand problems

Save/load content types' expanded status to view, and make sure it
is synchronized with client.
Treeviews now receive/send collapse event/status from/to client.
I've rewritten the way how headings are opened by default
(because synch of collapsed status broke that, as sub-headings
were not expanded at core side).

Change-Id: I80f5b4d99fe5224391a92c4609f94ddbcf37b8ca
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153771
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>
(cherry picked from commit b95750af717e0693a13c3ef35277779e1394e0ae)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/158016
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

0 files changed, 0 insertions, 0 deletions