On second thought, allow `posts_per_rss` to be set in `pre_get_posts` to override the `posts_per_rss` option. There are backwards compatibility concerns otherwise.

Props nacin.
Partially reverts [27455]. Updates the unit test. See #25380.


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`get_term_children()` returns an array of IDs, not objects. The docs have been updated to reflect this.

Fixes #27312.


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In `get_terms()`, leverage `get_term_children()` over `_get_term_children()` when making sure to show empty terms that have children in a hierarchical taxonomy while avoiding duplicates.

Adds unit test for `child_of` param. Adjusts unit tests for `get_terms()`.

See [27108] and [27125].
Props SergeyBiryukov.
Fixes #27123.


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Set minimum z-index for the TinyMCE modals and adjust the z-index in DFW, see #26952
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