Default themes: Use the 'display' filter for get_bloginfo( 'name' ) attached to the wp_title filter.

props michelwppi.
fixes #26811.

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Autosave: Fix typo in event namespace. props avryl, see #25272.

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When using wp_editor(), make it easier to specify which editor is shown first, fixes #20822
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Consolidate handling of <object>, <audio> and <video> in wpautop() and add unit tests for them. Part props wonderboymusic, see #26864
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