[allura:tickets] Mass edit changes by Dave Brondsema

[Dave Brondsema]

Mass edit changing:

- **Milestone**: v1.16.0


ticket: tickets:#8519 Drop Python 3.7 Support

- **Milestone**: unreleased --> v1.16.0


ticket: tickets:#8521 Do not index empty ticket pages

- **Milestone**: unreleased --> v1.16.0