Ignore .DS_Store

Interestingly, these files were only created once I navigated into the
directories using the Mac OS X Finder.
Fixes for "Disable JS" bubble

1. Fix matching the TB user agent
2. Fix position of bubble for new TB (NoScript icon moved in TB 4.0)
3. Use correct icon for "Forbid scripts globally (advised)"
4. Nicer design for bubble
Formatting nit
Remove unnecessary verbiage from submission notifications
More compact submission list