Weeding tiles with bodies "in weed" doesn't show node

## Testmerges
#6334: 'Xenomorph Endgame' by Git-Nivrak at commit 97b9492b2e
#6071: '[V] Sorokyne Strata: Expanded Small corridors, removed 3000 unused tiles, Xenos can now weed everything except LZ's and surrounding of LZ's, allow LAZ for CAS inside structures with light blue Areas on Tacmap (glass ceiling hallways)' by Venuska1117 at commit 817ed55a47
#6824: 'Human bursting sounds + sprite, new hugging sounds' by Blundir at commit 0545431b86
#6820: 'Updates close backpack icon' by Blundir at commit e6e1e493fa
#6808: 'Attachments resprite' by Blundir at commit cc4fe40905
#6977: 'Mapping: LV522 Changes to overall map, including the size, poplimit, chokepoints and other such things' by spartanbobby at commit 36502bb625
#7025: 'Fixes giant lizard code breaking when disarmed, and adds some minor features to the mob' by VileBeggar at commit 2ff99d00fa
#6039: 'Project ARES TM Holder (v5)' by realforest2001 at commit eeaad6736c

## Round ID
23748

## Description of the bug
If a body has been dead long enough, it is buried in weeds.
You can weed THAT tile, and it is not visibly distinct to be the weed node.

## What's the difference with what should have happened?
The weed node source should be visible

## How do we reproduce this bug?
1. Have perma body
2. Have weeds "hide" the body"
3. Put node underneath "body outline" tile
4. Observe Weed node source not visible

## Attached logs
```
N/A
```

## Additional details
- Author: Hislittlecuzin
- Admin: SmellyHippie
- Note: None

Reproduce the issue using round 23748: create a perma body, let weeds hide it, place the node underneath the body outline tile, and observe the missing source. Trace the weed and body tile rendering involved in that scenario; done means the weed node source is visibly distinct while the body remains on the tile.

Written by the indexing model from the issue text.