Closes: https://github.com/zed-industries/zed/issues/24501

This has been broken for a while on linux (at least since Feb 8th!) for Assistant1.
It is also broken for Text Threads in Assitant2 (on macos and linux).

This should fix both.

Potentially related:
- https://github.com/zed-industries/zed/pull/29107

Release Notes:

- Fix for `ctrl-enter` shortcut in Assistant text threads incorrectly
opening inline assist instead of triggering Send.

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