Media Grid: Manage focus when toggling between the grid and an edit attachment modal

Props adamsilverstein for the initial patch.
Fixes #28857.

Built from https://develop.svn.wordpress.org/trunk@29282


git-svn-id: http://core.svn.wordpress.org/trunk@29064 1a063a9b-81f0-0310-95a4-ce76da25c4cd
The Underscore templates for Gallery settings should respect defaults when marking an `<option>` as `selected`.

See #28693.

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git-svn-id: http://core.svn.wordpress.org/trunk@29065 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When gallery settings are overridden, the JS-generated shortcodes need to check the new defaults before deleting attributes that it suspects are the same as the original default values.

`wp.media.collection` has a new method to do this: `setDefaults()`.	Also flips the use of `_.extend` to allow this method to be overriden on instance creation.

See #28693.

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git-svn-id: http://core.svn.wordpress.org/trunk@29066 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't render Attachment Display Settings when `display` is set to `false`. Currently, the value for `display` in the `media.view.AttachmentsBrowser` instance in the `media.view.MediaFrame.Select` frame is set to the value for `displaySettings`. 
These values do different things, so check for the existence of `display` on the state before arbitrarily setting it to the `displaySettings` value.

Real world: this hides display settings when you select an image while editing a Gallery.

Fixes #28653.

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git-svn-id: http://core.svn.wordpress.org/trunk@29067 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove white box-shadow divider from uploading status area for consistency.

Props paulwilde.
Fixes #28751.

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git-svn-id: http://core.svn.wordpress.org/trunk@29068 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid CSS: Media modal close icon should be consistent with other modals.

Props celloexpressions.
Fixes #29012.

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git-svn-id: http://core.svn.wordpress.org/trunk@29069 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid: remove pencil icon from attachment hover and a bunch of unused CSS.

Fixes #28945.

Built from https://develop.svn.wordpress.org/trunk@29288


git-svn-id: http://core.svn.wordpress.org/trunk@29070 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid: UI improvements to Attachment modal.

Props ryelle.
See #28844.

Built from https://develop.svn.wordpress.org/trunk@29289


git-svn-id: http://core.svn.wordpress.org/trunk@29071 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In `sanitize_file_name()`, replace `%20` and `+` with dashes. Remove unnecessary code from `_wp_handle_upload()`.

Adds unit tests.

Props ericmann.
Fixes #16330.

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git-svn-id: http://core.svn.wordpress.org/trunk@29072 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add exif `orientation` to data extracted in `wp_read_image_metadata()`.

Props shanebp.
Fixes 28916.

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git-svn-id: http://core.svn.wordpress.org/trunk@29073 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Whitelist `input` types that are styled in the scope of `.form-field`.

Props mauteri.
Fixes #28647.

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git-svn-id: http://core.svn.wordpress.org/trunk@29074 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct a few `@param` docs for `$walker`.

Props dnaber-de.
Fixes #29011.

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git-svn-id: http://core.svn.wordpress.org/trunk@29075 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Adds `<label>`s to current page selector and bulk actions `<select>` field so that screen readers have an explicit label.

Props joedolson.
Fixes #28867.

Built from https://develop.svn.wordpress.org/trunk@29294


git-svn-id: http://core.svn.wordpress.org/trunk@29076 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid: change text to "Close Media Panel" to provide context for screen readers.

Props joedolson.
Fixes #28976.

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git-svn-id: http://core.svn.wordpress.org/trunk@29077 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media Grid: improve uploader styles.

Props michalzuber, ericlewis.
See #28851.

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git-svn-id: http://core.svn.wordpress.org/trunk@29078 1a063a9b-81f0-0310-95a4-ce76da25c4cd