[FindReplace] Remove right border-radius to match button pairs

This removes `border-top-right-radius` and `border-bottom-right-radius` to improve the match of the left and right buttons when they are a pair.
Related to #6175

Screens:
Before:
![image](https://f.cloud.github.com/assets/2641501/1725456/19ebddd2-6280-11e3-8590-a2ad10c063dc.png)

After:
![image](https://f.cloud.github.com/assets/2641501/1725457/1cbbb3b6-6280-11e3-914d-e0043e73423e.png)