Improve UI text for project badges

Problem to solve

The UI text for badges is inaccurate, lengthy, or not following entirely the style guidelines.

Field	Current	Updated
empty state	This project has no badges, start by creating a new one above.	This project has no badges. Start by adding a new badge.
description	Customize this project's badges.	Add badges to this project.
deletion confirmation	You are going to delete this badge. Deleted badges cannot be restored.	If you delete this badge, you cannot restore it.
deletion failure	Deleting the badge failed, please try again.	Failed to delete the badge. Try again.
addition failure	Adding the badge failed, please check the entered URLs and try again.	Failed to add new badge. Check the URLs, then try again.