git_ui: More git panel refinement (#24065)

- Removes flakey keybindings from buttons
- Moves git panel entries to use a standard ListItem
- Show a repo selector in the panel when more than one repo is present
- Remove temporary repo selector from title bar

Release Notes:

- N/A

crates/git_ui/src/repository_selector.rs

@@ -34,7 +34,8 @@ impl RepositorySelector {
         };
 
         let picker = cx.new(|cx| {
-            Picker::uniform_list(delegate, window, cx).max_height(Some(rems(20.).into()))
+            Picker::nonsearchable_uniform_list(delegate, window, cx)
+                .max_height(Some(rems(20.).into()))
         });
 
         let _subscriptions = if let Some(git_state) = git_state {
@@ -236,18 +237,4 @@ impl PickerDelegate for RepositorySelectorDelegate {
                 .child(Label::new(display_name)),
         )
     }
-
-    fn render_footer(
-        &self,
-        _window: &mut Window,
-        cx: &mut Context<Picker<Self>>,
-    ) -> Option<gpui::AnyElement> {
-        // TODO: Implement footer rendering if needed
-        Some(
-            div()
-                .text_ui_sm(cx)
-                .child("Temporary location for repo selector")
-                .into_any_element(),
-        )
-    }
 }