Add a sorting feature that will sort levels by top rated to lowest rated

[samimsu]

[BreezeBlaze]

Matt will reign!

[codesignist]

There is also a need to sort by size.

[GuillermoAbadLopez]

Such a great idea!

Also maybe have a tagg, for problems that introduced a new strategy, or that have a useful discussion for them, would be useful.

To understande the X-wing I had to jump from several problems comment sections to others until I found the original source, and good discussions about it 😅.