Sergey Biryukov 3bc41df4e4 Widgets: When checking for errors in Custom HTML widget, pass correct value to toggleClass() for Save button.
`toggleClass()` expects a boolean as a second argument, not an integer.

Props iCaleb.
Merges 42457 to the 4.9 branch.
Fixes #42867.
Built from https://develop.svn.wordpress.org/branches/4.9@42458


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42287 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2018-01-15 23:51:38 +00:00
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