TinyMCE: fix the 'editimage' plugin for touch devices. Better attempt to hide the onscreen keyboard when the media modal opens and TinyMCE is in focus. See #28595, #29166

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git-svn-id: http://core.svn.wordpress.org/trunk@29249 1a063a9b-81f0-0310-95a4-ce76da25c4cd
After [29422], make sure the internal array counter is not reset for the `$wp_filter` global.

Props kovshenin.
See #29070.

Built from https://develop.svn.wordpress.org/trunk@29472


git-svn-id: http://core.svn.wordpress.org/trunk@29250 1a063a9b-81f0-0310-95a4-ce76da25c4cd