Hide wp table column headers when no results

User Story # 15112

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Fix indenting in workPackagesTable template

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Rename a wp table class for consistency

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Living Style Guide: Document wp table w/no results

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #2018 from opf/feature/15122-notification-no-work-package-results

15122 Display notification when no work package results [fixup]