System and Scope Modifier variables do not evaluate in hover tooltip

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System Details

• Operating system name and version:
• VS Code version: 1.8.0
• PowerShell extension version: 0.7.2
• Output from $PSVersionTable:
  PSVersion 5.0.10240.17146
  WSManStackVersion 3.0
  SerializationVersion 1.1.0.1
  CLRVersion 4.0.30319.42000
  BuildVersion 10.0.10011.16384
  PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
  PSRemotingProtocolVersion 2.3

Issue Description

Not sure if this is considered a bug or not, but I noticed that when you use scope modifiers ($script: $global:, etc.) or the $env: prefix, these variables do not evaluate when hovered over like normal variables. They do display if paste them into Watches however. Is this something that is already a known issue or has plans to be addressed.

Also, I have additional feedback I would like to provide, is there a process to submit enhancement ideas to be evaluated?

Reproduce the issue in VS Code 1.8.0 with PowerShell extension 0.7.2 using the supplied PowerShell version, then compare hover evaluation with Watches for scope modifiers and the $env: prefix. Done means these variables evaluate correctly in the hover tooltip, with the existing Watch behavior preserved.