message_feed: Fix /me message alignment of message actions.
message_feed: Fix /me message alignment of message actions.

These were apparently no longer aligned with the timestamp.

Fixes #23101.

zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip,zulip/zulip