Allow simming of multiple gem combinations

[alewares]

Problem:
I am always looking for the Top Gear simulation to sim different combinations of mixed gems, not just use one 'brand' of gem in every single slot, on rotation. For example, I want to see the damage difference between having two sockets using [Haste/Mast] + [Haste/Vers] and the same sockets using [Haste/Mast] + [Vers/Crit]. My class has hard breakpoints for crit so this becomes necessary when hovering around the 33.34% crit margin. Instead, the tool limits simulations such that every time a different gem is used, it simply uses it for all the slots (excluding primary gems).

Suggestion:
Simply add a checkbox under the Gem sim section for "Sim mix and match" to allow it to sim for mixed and matched gem types. Also probably add a warning that this will increase iterations severely. It's up to the user anyway though how they want to customize iteration usage, so this shouldn't be a problem.

Alternatives:
There are no alternatives on Raidbots, but I have to leverage class knowledge to utilize gems on my own as a result and this would simply increase Quality of Life.

Attaching screenshot for a visual demonstration:

Attaching screenshot for a mock-up of desired functionality implementation in UI: