`Stack` in `DemoCellDown[11]`

Hi, the Demo works great! I can even launch RIDE and see its resource usage!
I got this after launching the demo process, closing the "Close me to Crash" window, exiting the stack of the crash, and dragging around cells in the Health Monitor window:
```
⎕clear
]Create # HMon\AplSource
RIDE_PATH←'AppData/Local/Programs/Dyalog/Ride-vim/Ride-4.6.exe'
Demo
LaunchDemoProcess 1
SYNTAX ERROR
DemoCellDown[11] hmonstack.Text←2 0↓⍕'TID' '' 'Stack'⍪(⊂'')⍪{⍵[⍋⍵[;1];]}↑threads.Values.(('&',⍕Tid)(' *'[1+Suspended])(⍪Stack.Description,⊂''))
∧
Stack
VALUE ERROR: Undefined name: Stack
Stack
∧
Suspended
VALUE ERROR: Undefined name: Suspended
Suspended
∧
```
Looks like `Stack` isn't implemented
https://github.com/Dyalog/HMon/blob/5313598126ffcc48be33104d566ab13b8ec07668/AplSource/DemoCellDown.aplf#L12