Patch 3017253 by Sébastien Le Callonne

Patch 3017253 by Sébastien Le Callonne

Two links in the “Toolbox” box on the left-hand side appear are set in different font
to the other links in the same box. This is because their font-family is set to
"Arial, Helvetica" whereas the other inherit the default font (specified as sans-serif).
The patch removes "Arial, Helvetica" so that these 2 links get the font-family
"sans-serif" like the others.

git-svn-id: svn://svn.code.sf.net/p/phpwiki/code/trunk@7536 96ab9672-09ca-45d6-a79d-3d69d39ca109