Description of the suggestion:
Currently, in lenses settings the user has a list of their lenses but it is not indicated in any obvious way that he lenses can be reordered by dragging them.
It took me longer than I'd care to admit to realize this feature exists, and I am sure there are others who are still unaware of it being possible.
The solution could be something very simple such as adding three horizontal lines at the ends of the lenses and their descriptions to make it clear that they can be dragged from there. This might also solve the issue of the items sometimes not being dragged and having text instead be selected.
