small visual improvements to the sidebar of the administrative interface on the site page

1) Close button of the flash message is small and too near the text
2) Version (long) text is out of its container right margin in narrowed
screens
3) Input error message in the form is badly rendered
4) Tweet messages iframe is not separated from "new application wizard"
box
small visual improvements to the sidebar of the administrative interface on the site page
small visual improvements to the sidebar of the administrative interface on the site page
small visual improvements to the sidebar of the administrative interface on the site page(1)