cleanup RFContent, mild refactor, check for RF-items addition, deleti… #397

All 1 520 tests pass, 8 skipped in 15s

1 files ±0 1 suites ±0 15s ⏱️ ±0s
1 528 tests ±0 1 520 ✅ ±0 8 💤 ±0 0 ❌ ±0
1 530 runs ±0 1 522 ✅ ±0 8 💤 ±0 0 ❌ ±0

Results for commit 21e9222. ± Comparison against earlier commit 90ca131.