Fix graph issues in #992

frontend/src/app/components/television/television.component.scss

@@ -17,7 +17,7 @@
 
 .chart-holder {
   position: relative;
-  height: 650px;
+  height: 655px;
   width: 100%;
   margin: 30px auto 0;
 }

frontend/src/app/dashboard/dashboard.component.scss

@@ -218,7 +218,7 @@
 }
 
 .mempool-graph {
-  height: 250px;
+  height: 255px;
 }
 .loadingGraphs{
   height: 250px;