Fixed a bug on the website that caused the category to get lost on preview.
Fixed a bug on the website that caused the category to get lost on
preview.

eromoe/flask-website,MurtazaB/flask-website,LiHaoGit/flask-website,mitsuhiko/flask-website,LiHaoGit/flask-website,eromoe/flask-website,LiHaoGit/flask-website,eromoe/flask-website,MurtazaB/flask-website,mitsuhiko/flask-website,mitsuhiko/flask-website,MurtazaB/flask-website