Use `round()` instead of `floor()` when resizing image dimensions.

Updates unit tests.

Props SergeyBiryukov, kitchin.
Fixes #18532.

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Use `sanitize_mime_type()` instead of `urlencode()` when string-building `<option>` values in `->get_views()` for media list tables.

`urlencode()` was introduced in [28553] via _duck and yours truly.

Got weirder after [29625].

Props birgire.
Fixes #30123.

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Improve the `@param` docs for `trackback_response()` and `validate_another_blog_signup()`.

See #30224.

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Add missing `@param`s to `src/wp-includes/pomo` files.

See #30224.


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Improve the `@param` docs for `src/wp-includes/wp-db.php`.

See #30224.

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Improve the `@param` docs for `src/wp-includes/widgets.php`.

See #30224.

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Improve the `@param` docs for `src/wp-includes/user.php`.

See #30224.

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Improve the `@param` docs for `src/wp-includes/pluggable*`.

See #30224.

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Improve the `@param` docs for `src/wp-admin/includes/plugin.php`.

See #30224.

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Improve the `@param` docs for `src/includes/rewrite.php`.

See #30224.

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TinyMCE: update translatable strings, see #30560.
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Improve the `@param` docs for `src/wp-includes/post*.php`.

See #30224.

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Improve the `@param` docs for `src/includes/theme.php` and `src/includes/update.php`.

See #30224.

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Improve various `@param` docs.

See #30224.

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Improve various `@param` docs.

See #30224.

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TinyMCE: update to 4.1.7, changelog: https://github.com/tinymce/tinymce/blob/master/changelog.txt. Fixes #30560.
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Improve various `@param` docs for `src/wp-includes/class-wp-customize*.php`.

See #30224.

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WPDB: Before fetching results, make sure we have a valid result resource to fetch them from.

Fixes #27982.

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Improve various `@param` docs for `src/wp-admin/includes/class-wp-filesystem-*.php`.

See #30224.

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Improve various `@param` docs for List Tables.

See #30224.

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