WP_Session_Tokens: Can't abstract a static method.

Implementations can choose to implement the drop_sessions() method on their own.

see #20276.

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git-svn-id: http://core.svn.wordpress.org/trunk@29008 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Plugin install: display cards in groups if the API returns them with the appropriate information. props tellyworth. fixes #28673.

Built from https://develop.svn.wordpress.org/trunk@29225


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Add 'Details' links to installed plugins.

Installed plugins that are up to date are now returned in the update-check API response.

props tellyworth.
see #17902.

Built from https://develop.svn.wordpress.org/trunk@29226


git-svn-id: http://core.svn.wordpress.org/trunk@29010 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Plugin Install screens: Pass locale and installed plugins to the API, for context.

props tellyworth.
see #17902.

Built from https://develop.svn.wordpress.org/trunk@29227


git-svn-id: http://core.svn.wordpress.org/trunk@29011 1a063a9b-81f0-0310-95a4-ce76da25c4cd