Avoid panic by accessing view handle by global in wrong window

View handles are window specific but this global will be doing things
in all windows, that would cause a panic when it attempted to update
a status bar mode indicator in a background window

Co-Authored-By: Mikayla Maki <mikayla@zed.dev>

crates/vim/src/test/vim_test_context.rs

@@ -43,6 +43,10 @@ impl<'a> VimTestContext<'a> {
                     toolbar.add_item(project_search_bar, cx);
                 })
             });
+            workspace.status_bar().update(cx, |status_bar, cx| {
+                let vim_mode_indicator = cx.add_view(ModeIndicator::new);
+                status_bar.add_right_item(vim_mode_indicator, cx);
+            });
         });
 
         Self { cx }