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.
BREAKING CHANGE: To allow for the `name` property, any widgets that were previously targeted by name should be targeted by class instead. This affects **all modules and all popups**, as well as several widgets inside modules. **This will break a lot of rules in your stylesheet**. To attempt to mitigate the damage, a migration script can be found [here](https://raw.githubusercontent.com/JakeStanger/ironbar/master/scripts/migrate-styles.sh) that should get you most of the way.
Resolves#75.
