web-ui settings: Improve font settings layout, clean up related css file.
web-ui settings: Improve font settings layout, clean up related css file.

BUG=75327
TEST=Verify that sample font text is no longer clipped by default.
Review URL: http://codereview.chromium.org/6708040

git-svn-id: http://src.chromium.org/svn/trunk/src@78771 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 929fccc91dc899020fd2213c708347b529d965f3
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser