In line with QEP 401, the Vector Layer Properties has been switched to model-based tree views.
This has enabled new functionality, including the ability to switch between field names and field aliases in both the Available Widgets and Form Layout panels.
Additional enhancements include:

• Orphan fields are highlighted in the Form Layout, emulating the UX of broken relations.
• Improvements in broken relations: retain relation names when the relation is still available in the relation manager,