Update functionality wrt subdataset display / behaviour / filtering

[jsheunis]

This PR:

• Fixes subdataset filtering to filter on name, givenName, and familyName provided that the property value in each case is not null
• closes https://github.com/datalad/datalad-catalog/issues/291
• Update subdataset filtering behaviour to only show filtering options when the number of subdatasets > 3. This will hide the filtering options otherwise. Additionally, if the filtering options are hidden, the tags on each subdataset will be deactivated (still visible, but not clickable)
• closes https://github.com/datalad/datalad-catalog/issues/370
• Clears filtering options (filtering text, selected filter tags) when navigating to a subdataset, both from the subdataset view and the content aka file tree view. This prevents the filtering options from remaining and subsequently filtering the subdatasets of the recently selected dataset (after filtering).
• closes https://github.com/datalad/datalad-catalog/issues/372

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (4f86716) 86.19% compared to head (d8090c6) 86.19%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #373 +/- ## ======================================= Coverage 86.19% 86.19% ======================================= Files 43 43 Lines 2709 2709 ======================================= Hits 2335 2335 Misses 374 374 ``` | [Flag](https://app.codecov.io/gh/datalad/datalad-catalog/pull/373/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/datalad/datalad-catalog/pull/373/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad) | `79.07% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=datalad#carryforward-flags-in-the-pull-request-comment) to find out more.

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