Localisation updates from https://translatewiki.net.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1656 c400ca83-b69d-9dd7-9705-49c6b8615e23
Fix dropdown arrow on Android.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1657 c400ca83-b69d-9dd7-9705-49c6b8615e23