limit mouse events to difficulty bar

frontend/src/app/components/difficulty/difficulty.component.html

@@ -4,7 +4,7 @@
     <div class="card-body more-padding">
       <div class="difficulty-adjustment-container" *ngIf="(isLoadingWebSocket$ | async) === false && (difficultyEpoch$ | async) as epochData; else loadingDifficulty">
         <div class="epoch-progress">
-          <svg class="epoch-blocks" height="22px" width="100%" viewBox="0 0 224 9" shape-rendering="crispEdges" preserveAspectRatio="none">
+          <svg #epochSvg class="epoch-blocks" height="22px" width="100%" viewBox="0 0 224 9" shape-rendering="crispEdges" preserveAspectRatio="none">
             <defs>
               <linearGradient id="diff-gradient" x1="0%" y1="0%" x2="100%" y2="0%" gradientUnits="userSpaceOnUse">
                 <stop offset="0%" stop-color="#105fb0" />
@@ -22,7 +22,7 @@
               class="rect {{rect.status}}"
               [class.hover]="hoverSection && rect.status === hoverSection.status"
               (pointerover)="onHover($event, rect);"
-              (pointerout)="onBlur($event);"
+              (pointerout)="onBlur();"
             >
               <animate
                 *ngIf="rect.status === 'next'"