Target selection does not work on docx report generation

[putsi]

Steps to reproduce:

1. Create a project with multiple targets.
2. Save multiple check results in all targets.
3. Go to report generation menu on the target.
4. Select DOCX-report template.
5. Uncheck some of the target-checkboxes.
6. Click generate and open the report.
7. Notice, that all targets are included in the report.

I did some diagnostics and it seems that DocxReport.php gets proper $data (contains only selected targets) when being constructed by getPlugin on ReportPlugin.php.
However after this when the actual report generation starts, _expandLists() of DocxReport.php generates lists for all targets instead of the targets in $data.