It is currently not possible to navigate through the QuickFix (CodeActions) popup. For VIM users this really breaks the workflow. This extension displays quick fixes in a quick open rather than in the menu.
How to use
You can get the extension here:
The command to open the quick fix picker is:
The quick picker can be traversed with the following commands:
Why does this exist?
The quick open popup is a native popup and there for does not support it yet. It is unclear when the support for it is comming. You can follow this issue: https://github.com/microsoft/vscode/issues/55111