GenericThings: add minimal charging current for generic car.

genericthings/integrationplugingenericthings.json

@@ -1813,6 +1813,18 @@
                             "minValue": 0,
                             "maxValue": 100,
                             "defaultValue": 100
+                        },
+                        {
+                            "id": "20faf2b8-2b40-4bee-b228-97dbaf0cdffc",
+                            "name": "minimalChargingCurrent",
+                            "displayName": "Minimal charging current",
+                            "displayNameEvent": "Minimal charging current changed",
+                            "type": "uint",
+                            "unit": "Ampere",
+                            "writable": true,
+                            "minValue": 6,
+                            "maxValue": 20,
+                            "defaultValue": 6
                         }
                     ]
                 }