Cosmetics, OC7 related

In OC7 the CSS substitutions like %webroot% seem to have vanished.
Accessing images (e.g.) with realtive paths seems to work (hopefully).
Tested on my local OC6 and OC7 config. Also, the CSS class for the
personal configuration, formerly "personalblock" has vanished. Instead,
a plain "section" is used in OC7.