Sync CSS/JS injection settings

It probably doesn't actually affect anything, but sync the injection
settings for extension start with the same settings in the manifest.
Respect itemprop=photo microstyle

Don't invert these "photo" images in smart invert mode.
Fix popup width in Chrome 38

For some reason, the width calculation has changed in Chrome 38. Make it
dynamically adjust the width to the width of the widest label by not
allowing labels to wrap.