#13 clean up style sheet 20 mins

[matslats]

some styles are left over which I think could be removed.
Didn't we get down to one table style? tabular?
Do we need editbox? scollable, innerframe, outerframe,
arrow, agenda, grid?
did you know that
margin-left: 20px;
margin-right: 20px;
can be replaced by
margin: 0px 20px;