Hide menu

[arkrost]

Hi! How can I hide menu and leave only the ghost_text. I have 2 use-cases:

1. I want to trigger completion with the completion menu hidden. Right now, 'show' action shows both menu and ghost_text
2. I want to close only completion menu and leave the ghost text once I select some option. I see it useful for some multi-line snippets.

[krovuxdev]

#1572