Have the dependencies list show when a dependency is conditionned to a cabal conditional

[tchoutri]

In the following screenshot, we can see that some packages are shown multiple times due to the fact that cabal conditionals are used:

It would be great to explore some alternative designs to show that the version bounds are different when certain conditionals are in place.

[tchoutri]

This might involve storing a potential conditional in the storage of a dependency for a release.

[alt-romes]

I'm also interested in seeing this through.

In particular, if a flag triggers a dependency X, I wouldn't want to see X as a "normal" dependency but rather have it be visually distinct from the actual dependencies (possibly even shading it down if the flag is off by default)

[tchoutri]

Romes cannot do this at the moment, it is thus free for someone else to take on. :)