Add missing “Progess Bar” with WPFolks badges

On the /badges page, there are still many badges that can add a “Progress Bar“.

Here is the list of badges:

• Sprout
• Explorer
• Sustained Contributor
• Apprentice
• Scholar

I love to call on all other folks to review the /badges page, and if you feel that we should have more progress bars on other badges, feel free to write a comment on this roadmap item.