Step 3: Correct color

On IE10 I observed hard to read button text when making a change. See screenshots.

Steps to reproduce:

1. Go to http://en.wikipedia.beta.wmflabs.org/wiki/Main_Page?debug=true
2. Open ULS through cog
3. Select Display (screenshot "Step 3")
4. Select the second button with the language name (screenshot "Step 4")

The background color of the button changes to "silver" and makes it hard to read.

Version: master
Severity: normal

Attached: