Import status dashboard pagination issue - follow-up to #4317

[stefan-korn]

Current Behavior

since #4317 the pagination of the import status dashboard is not correct anymore, if there are datasets filtered out due to non-importable distributions. Pagination is still pointing to all datasets irrespective of the filter. This may lead to empty pages in the pager and pages with less items than pagination items per page setting.

Expected Behavior

Pager should reflect the actual state of filtered datasets.

Steps To Reproduce

Have more than 10 datasets, some of them having no importable distributions (like PDF, DOC, etc.).
See that pagination of import status dashboard is not correct.

Relevant log output (optional)

No response

Anything else?

No response