[Feature Request] Setting for including variables in completion without trigger `$`

[sharpchen]

Prerequisites

• I have written a descriptive issue title.
• I have searched all issues to ensure it has not already been requested.

Summary

I would like to request a setting to include variables on completion list without triggering $ to save my hand from typing it, I just don't like typing $.

Proposed Design

For example, when typing IsWi, $IsWindows should appear in completion list even if I didn't type leading $. And this kind of item should autocomplete the $ on confirm.