IntelliSense - Display named parameters in auto-completion list without needing editor.wordBasedSuggestions.

[seraku24]

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview2-003121)

Product Information:
 Version:            1.0.0-preview2-003121
 Commit SHA-1 hash:  1e9d529bc5

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.10586
 OS Platform: Windows
 RID:         win10-x64

VS Code version: 1.4.0
C# Extension version: 1.3.0

Steps to reproduce

1. Disable editor.wordBasedSuggestions.
2. Type a method name and open parenthesis.

Expected behavior

The names of the parameters of a method are included in the auto-completion list.

Actual behavior

The names of the parameters of a method are missing.

Note that with editor.wordBasedSuggestions enabled, parameter names might be shown but only as a side effect of that feature. This issue is a request to match the IntelliSense behavior of Visual Studio, which specifically handles parameter names within the context of method calls.