Missing properties in expanded view of the payload (Advance view)

**The bug**
Properties that are not found in the context do not show when expanding them, they disappear.

**What part of Nexus is affected**
- [x] Fusion
- [ ] Delta
- [ ] CLI
- [ ] Documentation

**To Reproduce**
Steps to reproduce the behavior, e.g. for Fusion:
1. Go to [this resource](https://bbp.epfl.ch/nexus/web/bbp/ncmv3/resources/https%3A%2F%2Fbbp.epfl.ch%2Fnexus%2Fv1%2Fresources%2Fbbp%2Fncmv3%2F_%2Fbd3b05fd-3e54-40f3-ab1c-0da5ad97f7ef)
2. Click on `Expand` and then `Fold`
3. See the list of properties
4. Then turn off the `Expanded` toggle
5. Click on `Fold` (without expanding)
6. Compare the list of properties when expanded, `emodel`, `iteration`, `ttype` are missing in the first case.

**Expected behavior**
Properties should always show, the lists should correspond to each other. Properties that are not in the context should use the `vocab` value of the resource' context

**Screenshots**

Start by reproducing the issue in the Fusion resource view using the linked resource, following the Expand, Fold, and Expanded-toggle steps. Compare the property lists in both states and verify that properties missing from the context remain visible using the resource context's vocab value.

Written by the indexing model from the issue text.