Twenty Fifteen: using an opaque share icon as the default instead of semi-opaque "no" icon that suggests a bug.

Props iamtakashi, fixes #30148.


Built from https://develop.svn.wordpress.org/trunk@30810


git-svn-id: http://core.svn.wordpress.org/trunk@30800 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: updating the .pot to reflect changes in r30790.

Props iamtakashi, fixes #30603.


Built from https://develop.svn.wordpress.org/trunk@30811


git-svn-id: http://core.svn.wordpress.org/trunk@30801 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE, image toolbar: remove the animation and make the box-shadow lighter. Props melchoyce, fixes #30664.
Built from https://develop.svn.wordpress.org/trunk@30812


git-svn-id: http://core.svn.wordpress.org/trunk@30802 1a063a9b-81f0-0310-95a4-ce76da25c4cd