Add temporary hooks for the widgets feature team to wp_widget_control().

props westonruter.
see #26661.
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Add comments for temporary hooks. see #26661.
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Remove some @uses references to `apply_filters` and `do_action` rendered redundant by hook documentation.

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First there were two, and now there are three -- in the @since versions that came before and that shall be. And so it will be, says nacin.

Props JustinSainton, SergeyBiryukov, DrewAPicture.
Fixes #26713.

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Being consistent is the gist, no single @since should have been missed.

see #26713.
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Always do an HTTP request on credits.php when running a development version of WordPress.

fixes #26727.

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In `WP_Query::get_queried_object()`, move the check for `$query['terms']` to a place where `$query` is actually set. This should be included if [26864] makes it into 3.8.1.

Props SergeyBiryukov.
See #26728, [26864], #26634, #26627.



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