Typescript: Rationalize our presentation and handling of merged/alias symbols in the IDE.

[CyrusNajmabadi]

Examples of where we could be better:

1. Quick info for an alias could present information about the alias, as well as information about what the alias points to.
2. Goto-type for a union type could allow you to go to any constituent union-type-element.
3. Goto-def on a merged symbol could allow you to go to any declaration.
4. Quick info on a merged symbol could show you all the constituent declaration pieces.

etc. etc.

[PFight]

Can we hope, that it will be implemented somtime soon?

It is very annoying, when using es6 modules import - all classes in application have described problems -no highlihting, etc. (because, every class in separate module). That's more, TSX misses type cheking, when component is imported (attribute types and names are not checked at all).

[Odiriuss]

Is there any plans at all to implement this? It's very frustrating to work with code that's not properly highlighted...

[DanielRosenwasser]

I think we already did this?