Thumbnail overlap tags list (Horizon Theme + Topic List Thumbnails)

Bug
,
1

There is an issue with z-index in the Horizon Theme + Topic List Thumbnails theme component:

The dropdown field of the tags select field is overlaped by thumbnails as can be seen in the screenshot below.

image
image1463×698 145 KB

2

I think the proper fix has to be done in the Horizon theme.
This snippet should fix this and other z-index issues with --topic-list overlapping list-controls:

/* category view: fix z-index issue with topic list overlapping list-controls */
.container.list-container.--topic-list {
    z-index: 0;
}