Description of problem:
The topology list view had a separator line until 4.9. At the moment the topology list "jumps" 1px up and down when hovering/leaving a list item.

Version-Release number of selected component (if applicable):
4.10, works fine in 4.9

How reproducible:
Always

Steps to Reproduce:
1. Switch to dev perspective
2. Import a deployment or select a namespace with some deployments
3. Hover with the mouse (or try it with the keyboard) over some list items

Actual results:
1. Separator lines are missing between the deployments
2. Hover let the list elements below the hovered item jump by 1px

Expected results:
1. Separator lines should be shown
2. When hover/selecting an item the items below the current item should stay at their position

Additional info:
CSS rule which let the attribute jump down:

.odc-topology-list-view .pf-c-data-list__item.pf-m-selectable:hover:not(.pf-m-selected):not(:last-child), .odc-topology-list-view .pf-c-data-list__item.pf-m-selectable:focus:not(.pf-m-selected):not(:last-child) {
    --pf-c-data-list__item--BorderBottomWidth: 1px;
}