Material grouping suggestion: Splitting Thargoid and Guardian items into two groups

[CmdrWode]

Currently (in latest source code) all Guardian and Thargoid items are lumped together.

• Thargoid items could be split between Thagoid Ship and Thargoid Surface Site items.
• Sensor Fragment could be moved from Unknown to Thargoid Site section (it drops from Thargoid Scavengers)
• Guardian items could be split between all ruins sites (both dormant and active) and items that are only available at the active ruin sites.

Example Materials view:

Example Data view:

If this change is wanted (or some variant of this), I can make the necessary code changes & pull/submit them.

[msarilar]

this looks good, go for it 👍