Consider switching to haskell-gi

[ghost]

The haskell-gi bindings for GTK/Pango are worth considering since they are much more complete and easier to maintain.

[Fuuzetsu]

It only works with GHC 8.0+ due to OverloadedLabels. If that's ok then maybe I'd be in favour. I want to throw away a lot of the code in pango area anyway.

[mrkgnao]

OverloadedLabels makes for extremely slow compiles. Leksah, for instance, stopped using the labels (you can write, e.g. scrollbarDelete w instead of #delete w): leksah/leksah#303

[jhance]

Do we pay the compilation penalty for it as a user of the library though?

[mrkgnao]

You mean even if we don't use the labels in Yi itself? I don't think there's any significant penalty in that case; that's what Leksah did, for instance.

I do think there are gains to be had by removing OverloadedLabels altogether from haskell-gi, since there are hundreds of, e.g. generated IsLabel instances we won't be using.