[Suggestion] Autocomplete for edit controls

# Scripts for integration

Uberi made a cool script here:

https://github.com/Uberi/Autocomplete

It adds an auto-complete box which allows you to complete text as you type. It'd be cool to see this for edit controls:

```ahk
language := this.AddControl("Edit","myEdit","","")

myEdit.autocomplete := ["VBScript","JScript","Powershell"]
```