Enable scrolling in menus

[saladinalep]

ref #95

[saladinalep]

This is what I have so far.
What do you think?

[FrodeSolheim]

Hi, I did not notice this pull request until now! As a first draft, the scrolling looks fine (it should probably use constants to define the max visible items etc, but that's details. And later, animating the scrolling menu would be nice of course).

The main problem with your interest in save states is that right now, the number of save states is somewhat static due to how events are used to trigger loading/saving state. So, that whole bit also needs a rework. But for floppy list scrolling, this code could be useful sooner :)

[saladinalep]

As a first draft, the scrolling looks fine (it should probably use constants to define the max visible items etc, but that's details. And later, animating the scrolling menu would be nice of course).

That's great!
I was contemplating the use of fsemu_util_spring_t to animate the scrolling. If it proves straightforward, I will include it in this PR.

the number of save states is somewhat static due to how events are used to trigger loading/saving state. So, that whole bit also needs a rework

Right. This will probably be my next little project :)