Use a more specific selector for the count displayed on Add Themes network admin screen.

props mantismamita, nikolov.tmw.
fixes #29421.
Built from https://develop.svn.wordpress.org/trunk@29786


git-svn-id: http://core.svn.wordpress.org/trunk@29558 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS links for planet.wordpress.org

see #27115
Built from https://develop.svn.wordpress.org/trunk@29787


git-svn-id: http://core.svn.wordpress.org/trunk@29559 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS URLs for core.trac.wordpress.org

see #27115
Built from https://develop.svn.wordpress.org/trunk@29788


git-svn-id: http://core.svn.wordpress.org/trunk@29560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use HTTPS URLs for trac.wordpress.org (and use core.trac.wordpress.org)

see #27115
Built from https://develop.svn.wordpress.org/trunk@29789


git-svn-id: http://core.svn.wordpress.org/trunk@29561 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Account for longer translations of 'Customize Your Site' button label.

props shooper.
fixes #29451.
Built from https://develop.svn.wordpress.org/trunk@29790


git-svn-id: http://core.svn.wordpress.org/trunk@29562 1a063a9b-81f0-0310-95a4-ce76da25c4cd