css modifications for tables and charts

static/css/charts.css

@@ -1,7 +1,8 @@
 /* Charts */
 .chart-container {
   display: flex;
-  height: 300px;
+  /* height: 600px; */
+  aspect-ratio: 1 / 1;
 }
 
 .chart {

static/css/tables.css

@@ -4,6 +4,10 @@
   overflow-y: auto;
 }
 
+table.sortable th:not(.sorttable_sorted):not(.sorttable_sorted_reverse):not(.sorttable_nosort):after { 
+    content: " \25B4\25BE" 
+}
+
 table {
   width: 100%;
   border-collapse: collapse;