* Minor style adjustments
* Removes "all" count because it's redundant to the count on New
* Updates generic class names with -- modifier to follow BEM and help avoid class name collisions
* Hides the toggle when bulk select is enabled (the UI ends up being too busy)
This PR adds a new toggle to switch the (new) /new list between showing topics with new replies (a.k.a unread topics), new topics, or everything mixed together.