chore: `Contextualbar` empty state consistency (#29341)

.../meteor/client/components/Contextualbar/Contextualbar.tsx

...eor/client/components/Contextualbar/ContextualbarBack.tsx

...or/client/components/Contextualbar/ContextualbarClose.tsx

...r/client/components/Contextualbar/ContextualbarHeader.tsx

...nt/components/Contextualbar/ContextualbarInnerContent.tsx

...mponents/Contextualbar/ContextualbarScrollableContent.tsx

apps/meteor/client/components/Contextualbar/index.ts

.../meteor/client/components/InfoPanel/InfoPanel.stories.tsx

apps/meteor/client/components/UserInfo/UserInfo.stories.tsx

apps/meteor/client/components/UserInfo/UserInfo.tsx

...eteor/client/components/VerticalBar/VerticalBarAction.tsx

...teor/client/components/VerticalBar/VerticalBarActions.tsx

...eteor/client/components/VerticalBar/VerticalBarButton.tsx

...teor/client/components/VerticalBar/VerticalBarContent.tsx

...eteor/client/components/VerticalBar/VerticalBarFooter.tsx

...eteor/client/components/VerticalBar/VerticalBarHeader.tsx

.../meteor/client/components/VerticalBar/VerticalBarIcon.tsx

...eor/client/components/VerticalBar/VerticalBarSkeleton.tsx

.../meteor/client/components/VerticalBar/VerticalBarText.tsx

apps/meteor/client/components/VerticalBar/index.ts