Bug 928787 - Convert in-content preference style sheets to LF; r=jaws
remove old landing page
remove prefpane headings
show the main panel when the page is loaded
fix history management and refactor navigation for prefpanes
make app handler rules for richlistitems more specific to #handlersView
implement new category list using richlistitems
update styles for new category list
add some more captions for pref groups
fix selectCategory()