Support additional input types in the Launch UI

[georgesnelling]

We don't currently support list/map or some of the less common types. This task is to at least implement list/map and explore if there is anything we can do about supporting the other types.

[schottra]

This issue originally included implementation of collections. Since collections are more commonly used, they were implemented first. The remaining types are a lower priority, so I've updated the description and labels to reflect that.

[kumare3]

@schottra I think Launch is very highly used and hence having the breadth covered is probably very important.