Use dataTables instead of bootstrap-table PMT #96080

Adds back multi-column sorting as well as configurable columns.
On project page: don't show milestones that don't have an action item
Merge pull request #132 from nikolas/project-milestones-fix

On project page: don't show milestones that don't have an action item
Merge pull request #131 from nikolas/datatables-dashboard

Use dataTables instead of bootstrap-table PMT #96080