Carousel extremely wide if it's inside a center-aligned block

[zerocrates]

Picking "Center" block alignment for a carousel block makes slick calculate an extremely wide width. This messes it up in lots of ways but the most obvious is that the next/previous arrows get pushed far offscreen.

This appears to be a known issue with Slick and being inside a flex container, which people have worked around with stuff like min-width: 0 or overflow: hidden... whether this is something this module should be applying/overriding or a core adjustment to the center alignment style, I'm not sure.

See https://forum.omeka.org/t/item-carousel-block-not-working-after-1-4-1-update/28850

[kimisgold]

For now, I put min-width: 0 on the carousel block since it's easy enough to do.