Missing features for parity with v1

[jaybuidl]

Features

### Tasks
- [ ] https://github.com/kleros/kleros-v2/issues/1059
- [ ] https://github.com/kleros/kleros-v2/issues/1349
- [ ] #1283
- [ ] https://github.com/kleros/kleros-v2/issues/1080
- [ ] #938
- [ ] #681
- [ ] https://github.com/kleros/kleros-v2/issues/325
- [ ] #889
- [ ] #917
- [ ] https://github.com/kleros/kleros-v2/issues/1359
- [ ] https://github.com/kleros/kleros-v2/issues/1316
- [ ] https://github.com/kleros/kleros-v2/issues/1317
- [ ] https://github.com/kleros/kleros-v2/issues/1449

Bugs

Dapps migrations

• [ ] https://github.com/kleros/kleros-v2/issues/1352