Add a vector of values for filter selections.

[Sebanisu]

So right now we have a drop down.

ocornut/imgui#1862

But the filters only allow one selection at a time. So in the past I've done vector of bool and used the values to choose what is enabled or not.

So this might not be that hard to just change the type to a vector instead of a single value. and make the code work with a vector.