TinyMCE: make the tooltip for the remove button in the image toolbar translatable.

Merges [30835] to the 4.1 branch.

Props pavelevap
Fixes #30694

Built from https://develop.svn.wordpress.org/branches/4.1@30861


git-svn-id: http://core.svn.wordpress.org/branches/4.1@30851 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: add another `Edit` translatable string for the tooltip of the Edit button on the image toolbar.

Merges [30839] to the 4.1 branch.

Props pavelevap
Fixes #30694

Built from https://develop.svn.wordpress.org/branches/4.1@30862


git-svn-id: http://core.svn.wordpress.org/branches/4.1@30852 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Customizer: Don't escape control descriptions in JavaScript templates.

Merges [30847] to the 4.1 branch.

Fixes #30682.

Built from https://develop.svn.wordpress.org/branches/4.1@30863


git-svn-id: http://core.svn.wordpress.org/branches/4.1@30853 1a063a9b-81f0-0310-95a4-ce76da25c4cd