When live-updating site title in toolbar, fall back to the site url if the title is empty.

props avryl.
see #28682.
Built from https://develop.svn.wordpress.org/trunk@30597


git-svn-id: http://core.svn.wordpress.org/trunk@30587 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Consistently handle an empty site title in Site and My Sites toolbar menus.

see #28682.
Built from https://develop.svn.wordpress.org/trunk@30598


git-svn-id: http://core.svn.wordpress.org/trunk@30588 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.1 Docs Audit: Clarify the DocBlock summary for the `edit_form_before_permalink` hook.

See #30469.

Built from https://develop.svn.wordpress.org/trunk@30599


git-svn-id: http://core.svn.wordpress.org/trunk@30589 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.1 Docs Audit: Convert a hook reference to an inline `@see` tag in the hook docs for the `image_add_caption_text` filter.

See #30469.

Built from https://develop.svn.wordpress.org/trunk@30600


git-svn-id: http://core.svn.wordpress.org/trunk@30590 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.1 Docs Audit: Fix a variety of issues with the DocBlock for the `default_page_template_title` filter.

Includes hyphenating 'drop-down', ensuring the DocBlock itself is correctly indented, and wraps lines at an appropriate length.

See #30469.

Built from https://develop.svn.wordpress.org/trunk@30601


git-svn-id: http://core.svn.wordpress.org/trunk@30591 1a063a9b-81f0-0310-95a4-ce76da25c4cd