Bug 949338 -The candidate panel of Asian language input methods are rend...

The candidate panel of Asian language input methods are rendered incorrectly.
Fix the position of the down arrow when candidate panel is collapsed.Now bug is fixed.
![before fixing](https://f.cloud.github.com/assets/4078325/1777374/c55c09ea-6824-11e3-8e5b-63524237e7b3.png)
![after fixing](https://f.cloud.github.com/assets/4078325/1777392/f52fad02-6824-11e3-89f3-299f46ab7ba6.png)