fix: Handle rtl/ltr for hangouts

[Inferato]

For some reason, Handouts didn't match the direction when RTL/LTR lang was chosen

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[itsjeyd]

Hi @Inferato, thank you for this contribution! Are you planning to continue working on the changes? If not, we'll line them up for a test run next.

[itsjeyd]

@Inferato All tests are green so I'm assuming that this PR is ready for review.

@mattcarter @openedx/content-aurora This is ready for engineering review by Aurora.

[mattcarter]

approved

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@Inferato 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.