Thank you very much for the provided runnable Dojo. The approach that you have taken is absolutely spot on, the only issue stands with the chosen element in the template. It is not a button - it is an anchor tag and disabled is not a valid attribute for an anchor tag:
If you replace the <a> with a <button>, the logic will work as expected. I have also updated the Dojo to use an MVVM bound grid. Here it is for your reference:
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