Shrinks the header bar from 50px to 40px.
updates to the login/sign up links

- remove the underline to make them a little less heavy
- add hover states - underline + color change.
- remove inline style from login link - is this a security risk, somehow?
Fix keyboard noise in lt_LT translation

I've been trying to fix this with the builtin Javascripty translation dialog for months, with no success so far.
Merge pull request #1338 from mgedmin/patch-1

Fix keyboard noise in lt_LT translation