Some HTTPS Everywhere functionality appears to be broken on 8.0a9

I compared the behavior between 8.0a8 and 8.0a9:

• Open 8.0a8, and check the "Block all unencrypted requests" in the HTTPS-E popup.

• Go to a mixedcontent website (go to the github repository efforg/https-everywhere then search for mixedcontent and find recent edited one, here's an example of such a site (not privatebin.net but the one written there): https://privatebin.net/?b5c69abb9501c2d5#fbNBF8M+XNeluv6+O00aGLjAWkrcUAnBDsgZLkP0RQY= )

• So open that site up while your browser console is opened, you can see that HTTPS-E injects an upgrade-insecure-requests header and everything is going through HTTPS now including scripts and css etc.

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• Open 8.0a9, and check the "Block all unencrypted requests" in the HTTPS-E popup.

• Go to the previously mentioned site.

• There doesn't appear to be any injection of upgrade-insecure-requests header, css broken etc as a result.