graphs: fix cpu graphs

dashboard/src/components/CpuUsage.vue

@@ -16,7 +16,7 @@ async function refresh() {
   if (error) return console.error(error);
 
   const labels = result.cpu.map(v => {
-    return moment(v[1]*1000).format('hh:mm:ss');
+    return moment(v[1]*1000).format('hh:mm');
   });
 
   const data = result.cpu.map(v => {

dashboard/src/components/MemoryUsage.vue

@@ -17,7 +17,7 @@ async function refresh() {
   if (error) return console.error(error);
 
   const labels = result.memory.map(v => {
-    return moment(v[1]*1000).format('hh:mm:ss');
+    return moment(v[1]*1000).format('hh:mm');
   });
 
   const data = result.memory.map(v => {
@@ -48,13 +48,15 @@ async function refresh() {
         ticks: { autoSkipPadding: 50, maxRotation: 0 }
       },
       y: {
-        ticks: { maxTicksLimit: 6 },
+        ticks: {
+          callback: (value) => {
+            return `${value} GiB`;
+          },
+          maxTicksLimit: 6
+        },
         min: 0,
         max: roundedMemoryGiB,
         beginAtZero: true,
-        callback: (value) => {
-          return (value/1024).toLocaleString('en-US', { maximumFractionDigits: 6 }) + ' GiB';
-        }
       }
     },
     interaction: {