Add small margin between tab text and collapsed tabs counter
Before: https://f.cloud.github.com/assets/601488/1296762/d690300a-30d0-11e3-9665-cafafa2b8673.png
After: https://f.cloud.github.com/assets/601488/1296764/dc1189fc-30d0-11e3-9711-efabc15ebe2a.png