Widgets: on clicking Add, don't move the chooser out of the widget early as that makes is visible at the bottom of the screen. Remove the cloned copy of it instead. Part-props jeremyfelt, fixes #26417.
Built from https://develop.svn.wordpress.org/trunk@26651


git-svn-id: http://core.svn.wordpress.org/trunk@26541 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: When only one theme is available, show just the details view.

Only one theme may be available when no other themes are allowed (multisite), no other themes are installed, or when the user is denied the switch_themes capability but still has edit_theme_options.

props matveb, markjaquith.
see #25962.

Built from https://develop.svn.wordpress.org/trunk@26652


git-svn-id: http://core.svn.wordpress.org/trunk@26542 1a063a9b-81f0-0310-95a4-ce76da25c4cd