When there are multiple requests happening at the same time, sometimes the htmx-request class may not be removed

[tarunbhardwaj]

When using the same loading indicator for multiple parallel requests in htmx, there is an issue where the internal request count here can inadvertently become negative, leading to the htmx-request class not being removed from the designated element(s) once all requests have completed.

[tarunbhardwaj]

#2439 fixes this issue.