While you cannot do that (and I highly doubt it will ever change) you CAN rename the folder.
Do not rename anything else within the folder (like the manifest files)
Just the folder name is fine.
This will let you name by type. Example:
- Aircraft - Cessna 206
- Aircraft - Cessna 152
- Aircraft - Boeing 787
- Airport - KLAX
- Airport - WSSS
- Airport - VEGT
- Avionics - Garmin G1000
- Avionics - Better PFD for 787
- Helicopter - R44
- Helicopter - Bell 206
- Scenery - Alps
- Scenery - Malaysia (Kuala Lumpur)
- Utility - Hide Toolbar
- Utility - HUD toggle