Editor scrolling:
- Properly handle change of sidebar height when opening, closing or hiding postboxes.
- Add a flag when to start pinning. Set it to few pixels more than the initial editor height.
See #28328
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git-svn-id: http://core.svn.wordpress.org/trunk@29299 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Editor scrolling: set max-width: 100% for the text editor clone instead of always resizing it. See #29246.
Built from https://develop.svn.wordpress.org/trunk@29524


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Media Grid: on page load with `?item=` in the URL, if the model is not in the library: fetch it. Defer the triggering of `edit:attachment` until the model has been fetched.

Fixes #29052.

Built from https://develop.svn.wordpress.org/trunk@29525


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Media Grid: improve the design of upload errors.

Props celloexpressions.
See #29141.

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Media Grid: Don't show attachment details in the "sidebar" for errors.

Props ocean90.
Fixes #29037.

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Media Grid: don't try to display images that don't have `data.sizes` set. Also, don't show the "Edit Image" button.

Props ocean90.
Fixes #29245.

Built from https://develop.svn.wordpress.org/trunk@29528


git-svn-id: http://core.svn.wordpress.org/trunk@29304 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Modal: don't show the "Edit Image" button for attachments that don't have `data.sizes` set.

Fixes #28038.

Built from https://develop.svn.wordpress.org/trunk@29529


git-svn-id: http://core.svn.wordpress.org/trunk@29305 1a063a9b-81f0-0310-95a4-ce76da25c4cd
wpviews: whenever a view is updated or inserted, don't refresh ALL of the views.

Props avryl.
Fixes #28788.

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After [29507], move unreachable code from `_requery()` to `Query.get()`.

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