[DevTools] Show fallback in inspected element pane when no element is selected#35503

eps1lon merged 3 commits intofacebook:mainfacebook/react:mainfrom

eps1lon:sebbie/01-13-_devtools_show_fallback_in_inspected_element_pane_when_no_element_is_selectedeps1lon/react:sebbie/01-13-_devtools_show_fallback_in_inspected_element_pane_when_no_element_is_selectedCopy head branch name to clipboard