First draft of generic UI for space view properties

[abey79]

The goal is to introduce a new section in the space view/data result selection panel with a list-item-based UI for all properties. The idea is to prototype/lay the ground work for a fully generic poperty-to-list-time infrastructure to replace the current bespoke UI code.

This first take will likely be highly experimental, so behind a debug-only feature flag.

Mid-term Vision

• For "simple" property (e.g. that map to a single value, e.g. a bool), the corresponding non, hierarchical top-level list item should be generically implemented
• For "composite" properties made of multiple "simple" component, a hierarchy of a top-level item with sub-items for each components should be generically implemented
• For very complex properties (e.g. maybe Visible Time Range), a child UI would be manually implemented. This could be done either with sub-list-items, or with a complete bespoke UI code. Both would appear below a top-level list item with summary, in a way that would be consistent with all properties.

Initial take

Build semi-generic (if at all) code for (at least part of) existing properties, in a dedicated section behind a feature flag. The existing UI would remain as is for as long as needed.