accesskey tooltip rewriting

Does client-side rewriting of accesskey tooltip text so that it will be
more OS and browser specific. Dokuwiki should output all accesskey tooltips
as [ALT+<key>] because this patch matches on "[ALT+".

darcs-hash:20060428015158-05dcb-0102a1b2068c053e81dd21ad3927c78b6c9f349e.gz