Jake Spurlock 447d25f090 Media: Add "loading" as an allowed kses image attribute
With loading="lazy" being added to all images in [47554], let's ensure that it passes kses attributes too.

Fixes #50731.
Props TimothyBlynJacobs, peterwilsoncc, azaozz. 



git-svn-id: https://develop.svn.wordpress.org/trunk@48572 602fd350-edb4-49c9-b593-d223f7449a82
2020-07-23 00:42:48 +00:00
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2020-06-26 13:31:11 +00:00