Hover over issue on INDie diagrams

Issue: When hovering over an icon, the action (on hover) happens only on the margins of the icons. This bugs breaks all interest in the interactivity of the tool.

Desirable behaviour: Action on over should happen on the whole extension of the icon and action should stay as long as the cursor is on the icon.

Example here: https://studio.totem-project.org/container/block-v1:Totem+TP_IP_001+2018+type@vertical+block@19c334bad6dd49268c0f7da6b055b1b8# Tested on My computer and ISP 1 - Orange