This was previously posted by madengineer13, then archived.
"I think it would be helpful to be able to drag the components up or down in the browser tree. for instance, if I want to take a component created last, and drag it up to the top of the browser. This would help with keeping the components organized within the browser."
The subsequent discussion included a promise to at least remove the graphical indication that it's possible to reorder parts. This was almost a year ago... and the move indication is still there.
Honestly, I don't really care about the internal workflow limitations that make it difficult to implement rearranging the part list. We need something to fix the weird part orders that turn up while you're designing stuff. Maybe if I were just producing digital copies of existing designs I could keep a perfect part order, but that's not how things go in reality. I have literally lost parts in more complicated designs.