Follow-up of https://github.com/zed-industries/zed/pull/37352
Closes https://github.com/zed-industries/zed/issues/37132
* disabled word completions in the agent panel's editor
* if not disabled, allow to trigger word completions with an action even
if the completions threshold is not reached
Release Notes:
- Fixed word completions appearing in the agent panel's editor and not
appearing when triggered with the action before the completion threshold
is reached
Kirill Bulatov
84f166fc85