mrjoes/flask-admin — pull request #393 by muzuiget (2013-12-05 06:18:12+00:00)
Title: use unicode arrows in table column header

Replace the sort arrows image to unicode character, so we can stye them with css, and use other icon-set which not provide them with the same name.

Priview

![selection_002](https://f.cloud.github.com/assets/330812/1680363/f0457de0-5d74-11e3-9ad5-ecf44aa79cdb.png)