Favourites Menu functionality

[Brother Gabriel-Marie]

The Favourites Menu could use a little love.

- Manually arrange folders - you *can* manually arrange items in subdirectories, but not in the root of the tree.
- Perhaps the good ole' ctrl+up and ctrl+down for rearranging items by the keyboard?
- Maybe allow various icons for the folders in the tree?
- Maybe allow for different coloured text or text styles in the favourites tree?