Improvements advices on configuration UI.

[Gateswong]

1. Can add a compact or grid view to binding setup list. This can help if I have many bindings.
2. Can we add a new binding under a group directly? Most of time I adding a new binding I have to scroll to bottom to find the new binding and have to drag around. It's also hard to drag to groups that needs scrolling up.
3. Can we add a new option to add all spells from spell book, and by default for current active spec in load conditions? It's not all the case, but very common that I want different bindings to same spell in different spec.