How would it benefit the server: Would make it easier to locate items within your inventory by dragging more valuable items to the top of your inventory or being able to sort them by name etc...
Potential Issues/Exploits: N/A
Additional notes: This would be a really helpful thing and I have been thinking about this for a few days now, I think it should work by dragging items in your inventory from one space to another, this is a little thing that would make a big difference in my opinion, and maybe even being able to sort them by name, weight etc..