Show correctly escaped characters

[m-mercuri]

Now fixing this issue for real.

This escapes the creation and edition of conferences in the backend, and "un-escapes" them when received in the frontend.

[flosell]

Hey, looks good to me overall. One more thing: could we also unsanitise the location data? This is where the problem is that triggered the initial issue and that's still there (set Bangkoks "Growth cafe & co." as the location to reproduce)

[m-mercuri]

Just added a new commit. Sorry for that, I was doing the lookup wrong and I wasn't able to reproduce the issue in the location field 🤦‍♂

[flosell]

Thanks, looks good!