Fix filters count display bug

Hi, thanks for the great extension!

I noticed a display bug in the filter count when it's over 10:
![bug](http://i.imgur.com/Snl1Kiv.png)

So I put the `<span>` before `filters` and set the position to `relative`, it should look good in all occasions now.
![fixed](http://i.imgur.com/IsEojiM.png)