Fixing css for info-icon mouse hover

Author: mbeisel

src/app/core/component/graph-display/graph-display.component.html

@@ -169,7 +169,7 @@ <h4 style="margin: 1em">Relations of {{currentPattern?.name}}</h4>
             <image *ngIf="enableDeletePattern" data-click="delete" data-content="patternLanguageId" class="node-action"
                    width="10" x="80" y="-20" xlink:href="assets/delete.svg"/>
             <image data-click="info" data-content="patternLanguageId" width="10" x="95"
-                   xlink:href="assets/Info_Simple_bw.svg"
+                   xlink:href="assets/Info_Simple_bw.svg" class="node-action"
                    y="-20"/>
             <text class="text" data-click="title" data-content="title" dominant-baseline="middle"
                   height="50" text-anchor="middle" style="font-weight: bold"