Footnote items can be (partially) reordered in rendered GLFM

To reproduce:

1. create a new issue
2. add this as the body:

I'm creating a footnote[^1] here as an example[^2] of how they are currently styled.

[^1]: This is my example footnote
[^2]: I'm another one _that has formatting in it_

3. Save the issue.
4. Hover over the footnotes.
5. you will see the grab handle at the left of each list item in the footnotes list
6. You will be able to drag and drop to rearrange once, after which the cursor will be stuck in the grabbing state and you will not be able to rearrange items
7. On page refresh you will see that the items were not actually rearranged anyway

We should not be showing the grab handles or allowing users to attempt to rearrange these footnote list items.

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Example:

I'm creating a footnote¹ here as an example² of how they are currently styled.

1. This is my example footnote ↩

2. I'm another one that has formatting in it ↩