Module overviews with many internal modules are hard to navigate

[sjakobi]

text is a good example: http://hackage.haskell.org/package/text-1.2.4.0#modules

There are more Internal modules than "public" modules, so it's hard to tell which modules are intended for public consumption.

I can imagine several ways to improve this:

• Internal modules could be elided by default, and revealed via a button, similar to how type class instances can be hidden and revealed.
• Links to internal modules could be shown in a different colour than public modules.

Regarding the criterion that distinguishes internal modules from public modules, I think we could re-use the not-home haddock option.

[tomjaguarpaw]

I would love something like this. I have the same problem in opaleye.