[TS] Code completion doesn't Filter entries

### Description

When I type "exp" and hit ctrl + space to call the code completion, it opens and jumps to the correct entry but doesn't filter the whole list.

### Use case/motivation

It should filter the list to just see the matched entries.

### Related issues

_No response_

### Are you willing to submit a pull request?

Yes

Reproduce the issue in the TypeScript editor by typing "exp" and pressing Ctrl+Space. Trace the code-completion filtering behavior from that entry point; done means the completion list contains only entries matching the typed text while still selecting the correct entry.

Written by the indexing model from the issue text.