Renames existing `alphanumeric` sorting method to `label` and adds a new method called `name` which uses the real workspace name, akin to behaviour before #799.
BREAKING CHANGE: The workspace `sort` config option valid values have changed. Where `alphanumeric` is explicitly set, this will need changing to one of `label` or `name`.
Rewrites the module code to be better structured, in a similar pattern to the launcher. The code is now more robust and more maintainable, yay!
Fixes#705
Fixes an issue with moving favourite workspaces.
Fixes an issue with workspace visible state being incorrect.
Fixes an issue where the `inactive` class looked at hidden instead of closed favourites.
