Tidy up styling of connection status in the title bar (#3922)

This PR tidies up the styling of the connection status indicators in the
title bar.

Removed some debug styles and tweaked the styling to match the rest of
the title bar overall.

Release Notes:

- Improved the connection status indicators in the title bar.

crates/collab_ui/src/collab_titlebar_item.rs

@@ -528,8 +528,7 @@ impl CollabTitlebarItem {
             | client::Status::ReconnectionError { .. } => Some(
                 div()
                     .id("disconnected")
-                    .bg(gpui::red()) // todo!() @nate
-                    .child(IconElement::new(Icon::Disconnected))
+                    .child(IconElement::new(Icon::Disconnected).size(IconSize::Small))
                     .tooltip(|cx| Tooltip::text("Disconnected", cx))
                     .into_any_element(),
             ),
@@ -546,9 +545,9 @@ impl CollabTitlebarItem {
                 };
 
                 Some(
-                    div()
-                        .bg(gpui::red()) // todo!() @nate
-                        .child(Button::new("connection-status", label).on_click(|_, cx| {
+                    Button::new("connection-status", label)
+                        .label_size(LabelSize::Small)
+                        .on_click(|_, cx| {
                             if let Some(auto_updater) = auto_update::AutoUpdater::get(cx) {
                                 if auto_updater.read(cx).status() == AutoUpdateStatus::Updated {
                                     workspace::restart(&Default::default(), cx);
@@ -556,7 +555,7 @@ impl CollabTitlebarItem {
                                 }
                             }
                             auto_update::check(&Default::default(), cx);
-                        }))
+                        })
                         .into_any_element(),
                 )
             }
@@ -566,16 +565,18 @@ impl CollabTitlebarItem {
 
     pub fn render_sign_in_button(&mut self, _: &mut ViewContext<Self>) -> Button {
         let client = self.client.clone();
-        Button::new("sign_in", "Sign in").on_click(move |_, cx| {
-            let client = client.clone();
-            cx.spawn(move |mut cx| async move {
-                client
-                    .authenticate_and_connect(true, &cx)
-                    .await
-                    .notify_async_err(&mut cx);
+        Button::new("sign_in", "Sign in")
+            .label_size(LabelSize::Small)
+            .on_click(move |_, cx| {
+                let client = client.clone();
+                cx.spawn(move |mut cx| async move {
+                    client
+                        .authenticate_and_connect(true, &cx)
+                        .await
+                        .notify_async_err(&mut cx);
+                })
+                .detach();
             })
-            .detach();
-        })
     }
 
     pub fn render_user_menu_button(&mut self, cx: &mut ViewContext<Self>) -> impl Element {