grafana: enhance thruput stats in ZW network essential

hosts/grafana/dashboards/17cZUJkGk.json

@@ -39,9 +39,9 @@
             "mode": "palette-classic"
           },
           "custom": {
-            "axisCenteredZero": false,
+            "axisCenteredZero": true,
             "axisColorMode": "text",
-            "axisLabel": "RX",
+            "axisLabel": "TX/RX",
             "axisPlacement": "auto",
             "barAlignment": 0,
             "drawStyle": "line",
@@ -70,7 +70,6 @@
           },
           "links": [],
           "mappings": [],
-          "min": 0,
           "thresholds": {
             "mode": "absolute",
             "steps": [
@@ -99,10 +98,6 @@
                   "fixedColor": "#e24d42",
                   "mode": "fixed"
                 }
-              },
-              {
-                "id": "custom.axisLabel",
-                "value": "TX"
               }
             ]
           },
@@ -118,6 +113,10 @@
                   "fixedColor": "#7eb26d",
                   "mode": "fixed"
                 }
+              },
+              {
+                "id": "custom.transform",
+                "value": "negative-Y"
               }
             ]
           },
@@ -731,7 +730,7 @@
           "unit": "none"
         }
       },
-      "pluginVersion": "9.5.8",
+      "pluginVersion": "9.5.13",
       "reverseYBuckets": false,
       "targets": [
         {
@@ -902,7 +901,7 @@
           "unit": "none"
         }
       },
-      "pluginVersion": "9.5.8",
+      "pluginVersion": "9.5.13",
       "reverseYBuckets": false,
       "targets": [
         {
@@ -1020,8 +1019,7 @@
             "mode": "absolute",
             "steps": [
               {
-                "color": "green",
-                "value": null
+                "color": "green"
               },
               {
                 "color": "red",