Completion Method Overload Signatures Should Persist when that signature is selected

[JustinGrote]

Prerequisites

• [X] Write a descriptive title.

Description of the new feature/enhancement

When I autocomplete for a .NET method, the currently highlighted method shows the overload signatures

However, If I select a particular method, the overload signatures should continue to display until I close the parens on the other side.

Bonus: If I specify a parameter where the type can be determined, when I type comma the overload signatures should only filter to the ones that are now relevant.

Proposed technical implementation details (optional)

Described Above.

[daxian-dbw]

Due to the limitation of the tab completion results returned from PowerShell, the tool tip is just a multi-line string. So, it's not feasible to support this in MenuComplete.

That being said, it could be possible to support a similar experience with CompletionPredictor, though it won't be easy.