Converted the "VBA Properties" half of optfltr.src to optfltrpage.ui.

Change-Id: Ie200377f2956aa243b1be859eb52972b79e9dc66
Reviewed-on: https://gerrit.libreoffice.org/2961Reviewed-by: Petr Mladek <pmladek@suse.cz>
Tested-by: Petr Mladek <pmladek@suse.cz>