WebUI component - Grafana:

- Removed wrong GROUP BY
- Removed summary column "first"

src/webui/grafana_db_mon_kpis_psql.json

@@ -144,7 +144,6 @@
         "options": {
           "legend": {
             "calcs": [
-              "first",
               "min",
               "mean",
               "max",
@@ -169,7 +168,7 @@
             "hide": false,
             "metricColumn": "kpi_value",
             "rawQuery": true,
-            "rawSql": "SELECT\r\n  $__time(timestamp), kpi_value AS metric, device_name, endpoint_name, kpi_sample_type\r\nFROM\r\n  tfs_monitoring_kpis\r\nWHERE\r\n  $__timeFilter(timestamp) AND device_name IN (${device_name}) AND endpoint_name IN (${endpoint_name}) AND kpi_sample_type IN (${kpi_sample_type})\r\nGROUP BY\r\n  device_name, endpoint_name, kpi_sample_type\r\nORDER BY\r\n  timestamp",
+            "rawSql": "SELECT\r\n  $__time(timestamp), kpi_value AS metric, device_name, endpoint_name, kpi_sample_type\r\nFROM\r\n  tfs_monitoring_kpis\r\nWHERE\r\n  $__timeFilter(timestamp) AND device_name IN (${device_name}) AND endpoint_name IN (${endpoint_name}) AND kpi_sample_type IN (${kpi_sample_type})\r\nORDER BY\r\n  timestamp",
             "refId": "A",
             "select": [
               [