tdf#118938 XLSX import/export: fix permission for editing

The password for editing wasn't asked, also wasn't
exported in XLSX documents. Now it's exported in Calc
using the following steps, also verified before editing:

- In File->Save As, choose Excel 2007–365 (.xlsx) format;

- enable checkbox "Save with password" and click Save;

- in the dialog "Set password", click on "Options" and enable
checkbox "Open file read-only", and enter a password
for editing (i.e. skip the password for opening).

Note: Excel 2016 doesn't ask password for editing, but
Office 365 does. Passwords created in Excel haven't been
supported, yet. Also passwords with diacritics aren't
interoperable.

Note: saving the file under a different path is still
allowed both in Calc and Excel without asking the password
for editing.

Change-Id: Ic00d7c5a785e04d270a182a4087ea922d7d92979
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121371
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>

0 files changed, 0 insertions, 0 deletions