I know that I can 'right-click' the Details button and get the link address, but a link icon at the top of the feature would be great. The comments have it, the feature should to.
As you mentioned, this can be achieved by right clicking the Details button to get the link address.
We do have this functionality for comments and requirements, but this is because there is no other way to access these specific areas of a given feature.
At this time, we are unlikely to implement this feature as it isn't a high priority, but will keep it open as we gather more feedback from the community. I hope you understand.