Hides language links till google translate loads

- Hides the language links till Google Translate Gadget loads. If it
doesn’t load for some reason the links are hidden.
- Adjusts min-height styles slightly as the non-language link utility
area height was shorter than when the language links were present.
- Adds CSS classes to the language link helper to identify them and
hide them initially.
Merge pull request #610 from codeforamerica/lang-link-tweak

Hides language links till google translate loads