Add CSS variable ponyfill to the button iframe #491
Merged
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Currently the CSS variable ponyfill lives in the Answers SDK. Since we don't use the Answers SDK in the button iframe, our variables were not being ponyfilled which meant that they weren't working in IE11. Add the ponyfill to the button iframe's JS.
TEST=manual
J=PB-9812
Serve page in IE11, see font family is font family specified in the answers-variables file rather than the default IE11 font.