Improve tooltip position in block overview on mobile

frontend/src/app/components/block-overview-tooltip/block-overview-tooltip.component.html

@@ -3,7 +3,7 @@
   class="block-overview-tooltip"
   [class.clickable]="clickable"
   [style.visibility]="tx ? 'visible' : 'hidden'"
-  [style.left]="tooltipPosition.x + 'px'"
+  [style.left]="getTooltipLeftPosition()"
   [style.top]="tooltipPosition.y + 'px'"
 >
   <table class="table-fixed">

frontend/src/app/components/block-overview-tooltip/block-overview-tooltip.component.ts

@@ -96,4 +96,8 @@ export class BlockOverviewTooltipComponent implements OnChanges {
       this.cd.markForCheck();
     }
   }
+
+  getTooltipLeftPosition(): string {
+    return window.innerWidth < 392 ? '-40px' : this.tooltipPosition.x + 'px';
+  }
 }