close #918 counting character in cards/edit

based on http://gitfab.org/oshimaryo/e4081279-0cad-4e9b-a05c-cfa5772eda67
![countup](https://cloud.githubusercontent.com/assets/980357/5467532/5076f8e8-8604-11e4-80d3-29648bc28eca.gif)