Admin Metrics - Challenges Table

[yans80]

Developed with @javtran

• A sortable list of all challenges with core metrics (ID, challenge name, owner name, number of total tasks remaining, percentage of tasks completed, project name, is archived, date created, date last modified).
• Clicking on a project or challenge will take you to the existing project / challenge admin page.
• Clicking on an owner will take you to their OSM user page.
• Add filter and sort options.
• Search to filter by challenge/project name.
• Export table as CSV.
• Add super admin metrics section in the top right dropdown menu.
• Customizable paginations(default to 50 or # of rows if total less than 50).