[enh] Comment portal html.
[fix] Remove unused panel.css
[enh] Move artichaut framework into ynh-style.css file.
[fix] Remove unused SourceSansPro-Black font.
[enh] Use base64 version for ynh_ssowat font.
[enh] Remove some animations.
[enh] Move fonts.css content into ynh-style.css (reduce http requests).
[fix] Remove unused jquery files.
[fix] Remove unused icomoon files.
[enh] Massive cleanup.
[fix] Do not return formatted html in ynhpanel.json