Improve the algorithm selection dropdown

[LucasPilla]

Improve the selection dropdown so it is easier to find the algorithms, perhaps we could:

• split the algorithms by their complexities;
• change the design (arrangement, size, ...) to fit all algorithms and their names;

[PedramHaeri]

Hi I would like to try and fix this issue. could you please assign it to me?

[skbedi]

Hi, if this issue has not been completed, I would love to help out. Thank you!