Why can't we rearrange our items inside the in game store window?

I like gems but there are some gems I like more than others. So to reflect this I like to rearrange the gems in my inventory in order from most fabulous to least sparkly.

I recently tried to rearrange the gems I had in my inventory in the shop window and found that I couldn't do this. While I can still carry out this action by closing out my shop window, it's just a minor inconvenience. It would be wonderful if Riot got their programming elves to update the shop to allow us access to move our items around inside the shop window.

I know eventually this update will be carried out but if we could move it further up the priority list that would really make my day that much more glamorous.