Make closing the SSH modal equivalent to cancelling the SSH connection task (#19568)

TODO: 
- [x] Fix focus not being on the modal initially

Release Notes:

- N/A

---------

Co-authored-by: Trace <violet.white.batt@gmail.com>

crates/zed/src/zed.rs

@@ -274,7 +274,6 @@ pub fn initialize_workspace(
                 workspace.add_panel(channels_panel, cx);
                 workspace.add_panel(chat_panel, cx);
                 workspace.add_panel(notification_panel, cx);
-                cx.focus_self();
             })
         })
         .detach();