IFrame widget improvements (#15483)

changes - 
- make iframe side panel to match others -- ie use SidePanelHeader for
title
- make url optional in configuration to match that of the other widgets
(allow partial saves) - render No data status when error or no url
- split widget sizes into two -- graph widget sizes and widget sizes
(graph widgets are a subset of chart widgets)

packages/twenty-front/src/modules/page-layout/hooks/useEditPageLayoutWidget.ts

@@ -35,7 +35,7 @@ export const useEditPageLayoutWidget = (pageLayoutIdFromProps?: string) => {
 
       if (widgetType === WidgetType.IFRAME) {
         navigatePageLayoutCommandMenu({
-          commandMenuPage: CommandMenuPages.PageLayoutIframeConfig,
+          commandMenuPage: CommandMenuPages.PageLayoutIframeSettings,
           pageTitle: t`Edit iFrame`,
         });
       }