Dont show an error message when trying to use quick open with no book open
Update Instapaper
Preview panel: Improve robustness of resource loading from the book

Ensure that resources are always loaded from the current container, even
if the current container was changed since the base URL was specified.
While this is unlikely to happen, it is best to be robust.
Implement code to retrieve style information for the Live CSS panel
Handle media queries when finding matching CSS rules