* When an edit prediction is present in non-insertion modes, hide it but
show `tab Jump to edit`.
* Removes discarding of edit predictions when going from insert mode to
normal mode, instead just hide them in non-insertion modes.
* Removes zeta-specific showing of predictions in normal mode. This
behavior was only happening in special cases anyway - where the discard
of completions wasn't happening due to some other thing taking
precedence in `dismiss_menus_and_popups`.

Release Notes:

- N/A

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Co-authored-by: Conrad <conrad@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>