ssh remote: Handle disconnect on project and show overlay (#19014)

Demo:



https://github.com/user-attachments/assets/e5edf8f3-8c15-482e-a792-6eb619f83de4


Release Notes:

- N/A

---------

Co-authored-by: Bennet <bennet@zed.dev>

crates/title_bar/src/title_bar.rs

@@ -366,7 +366,7 @@ impl TitleBar {
             return self.render_ssh_project_host(cx);
         }
 
-        if self.project.read(cx).is_disconnected() {
+        if self.project.read(cx).is_disconnected(cx) {
             return Some(
                 Button::new("disconnected", "Disconnected")
                     .disabled(true)