Add a small margin to each graph

Author: mesca

timeflux_ui/www/monitor/assets/css/ui.css

@@ -1,7 +1,6 @@
 #main {
     padding: 1.5rem;
 }
-
 .chart-series {
     padding: 0;
     line-height: 0;
@@ -19,3 +18,8 @@
     padding-left: 1em;
     padding-right: 1em;
 }
+
+.column canvas {
+    margin-top: 5px;
+    margin-bottom: 5px;
+}