Themes: Style the Theme Author the same in the multi and singular view, make the links readable. Fixes #26306

Built from https://develop.svn.wordpress.org/trunk@26458


git-svn-id: http://core.svn.wordpress.org/trunk@26356 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Remove an unused Delete Theme link on the multiple view. See #25948

Built from https://develop.svn.wordpress.org/trunk@26459


git-svn-id: http://core.svn.wordpress.org/trunk@26357 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Remove a mp6 reference which is no longer needed. See #25948

Built from https://develop.svn.wordpress.org/trunk@26460


git-svn-id: http://core.svn.wordpress.org/trunk@26358 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Display Activated/Deleted messages below the H2, before the Themes. See #26305

Built from https://develop.svn.wordpress.org/trunk@26461


git-svn-id: http://core.svn.wordpress.org/trunk@26359 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Add a default image for when a theme doesn't have a screenshot. Props matveb. See #25959

Built from https://develop.svn.wordpress.org/trunk@26462


git-svn-id: http://core.svn.wordpress.org/trunk@26360 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Remove some unused CSS (we have neither a .theme-categories or .theme-linear-grid). See #25948

Built from https://develop.svn.wordpress.org/trunk@26463


git-svn-id: http://core.svn.wordpress.org/trunk@26361 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Update the responsive layouts for the Search box after r26461. See #26305

Built from https://develop.svn.wordpress.org/trunk@26464


git-svn-id: http://core.svn.wordpress.org/trunk@26362 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Remove a now defunct CSS class, .feature-container, which is no longer in use after r26141. See #25948

Built from https://develop.svn.wordpress.org/trunk@26465


git-svn-id: http://core.svn.wordpress.org/trunk@26363 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Remove the Tabs from the header of the Add New Theme page. Fixes #26310

Built from https://develop.svn.wordpress.org/trunk@26466


git-svn-id: http://core.svn.wordpress.org/trunk@26364 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Use _.throttle() instead of a custom one. Props matveb. Fixes #25981

Built from https://develop.svn.wordpress.org/trunk@26467


git-svn-id: http://core.svn.wordpress.org/trunk@26365 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Add a clearing <br/> to the end of .theme-browser.
This is needed to cause the browser to render .theme-browser's height as it's true height, previously the reported height was 1*.theme which caused the Theme scroller to kick in immediately (as the threshold was less than 0).
See #25981 See #25948

Built from https://develop.svn.wordpress.org/trunk@26468


git-svn-id: http://core.svn.wordpress.org/trunk@26366 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: When the user doesn't have switch_themes capabilities, and we've passed the current theme, detect the theme slug/stylesheet correctly so that the flags are set properly. See #25948

Built from https://develop.svn.wordpress.org/trunk@26469


git-svn-id: http://core.svn.wordpress.org/trunk@26367 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Do extra Cap checks before outputting links, and use full URI's. See #25948

Built from https://develop.svn.wordpress.org/trunk@26470


git-svn-id: http://core.svn.wordpress.org/trunk@26368 1a063a9b-81f0-0310-95a4-ce76da25c4cd