Keep function signature popup open during typing

[hood]

Is your feature request related to a problem? Please describe.
I constantly have to go back to a function name and trigger LSP hints to remember myself what type its arguments are.

Describe the solution you'd like
I'd like to have the argument type hint popup kept visible during my typing.

[bramhooimeijer]

This might not have to do with completion, more with the LSP configuration.
An easy solution is installing this: https://github.com/ray-x/lsp_signature.nvim