When should the UI window for a parameter hint terminate?

[kaylaerdmann]

Right now when showing PowerShell signature sets the UI window only shows for a small text region. Specifically, it shows from Cmd-Name t where t is the trigger character. As long as the cursor is in the region of the command to where the trigger character is the UI will display parameter hints. If the cursor is before or after that the window goes away.

This is happening because of what the ApplicableSpan is being set as in SignatureHelpResponse.cs

We need to decide what an appropriate span for parameter hints on signature sets is.

[daviwil]

This has improved dramatically by changing the VS Code extension to use the vscode-languageclient package. Now the signature help window stays visible as the user is typing parameters in the command. With bug #34 I'll add the ability to highlight the parameter that the user is currently typing :)