Fixed annoying flicker of pic of day attribution box on iPad.

Occured when selecting "Commons Page" or "License".
Improve login page layout efficency and re-enabled landscape login.

Didn't originally intend to re-enable landscape login, but the re-worked login layout positioning made it relatively simple.
Merge pull request #94 from montehurd/potdLicense

Fixed annoying flicker of pic of day attribution box on iPad.
Merge pull request #95 from montehurd/landscapeLogin

Improve login page layout efficency and re-enabled landscape login.