Another batch of lint fixes (#36521)

- **Enable a bunch of extra lints**
- **First batch of fixes**
- **More fixes**

Release Notes:

- N/A

crates/extensions_ui/src/extensions_ui.rs

@@ -863,7 +863,7 @@ impl ExtensionsPage {
         window: &mut Window,
         cx: &mut App,
     ) -> Entity<ContextMenu> {
-        let context_menu = ContextMenu::build(window, cx, |context_menu, window, _| {
+        ContextMenu::build(window, cx, |context_menu, window, _| {
             context_menu
                 .entry(
                     "Install Another Version...",
@@ -887,9 +887,7 @@ impl ExtensionsPage {
                         cx.write_to_clipboard(ClipboardItem::new_string(authors.join(", ")));
                     }
                 })
-        });
-
-        context_menu
+        })
     }
 
     fn show_extension_version_list(