FieldConfig: set min/max automatically for gauge (#21073)

public/app/plugins/panel/bargauge/BarGaugePanel.tsx

@@ -57,6 +57,7 @@ export class BarGaugePanel extends PureComponent<PanelProps<BarGaugeOptions>> {
       replaceVariables,
       theme: config.theme,
       data: data.series,
+      autoMinMax: true,
     });
   };
 

public/app/plugins/panel/gauge/GaugePanel.tsx

@@ -48,6 +48,7 @@ export class GaugePanel extends PureComponent<PanelProps<GaugeOptions>> {
       replaceVariables,
       theme: config.theme,
       data: data.series,
+      autoMinMax: true,
     });
   };
 

public/app/plugins/panel/stat/types.ts

@@ -27,8 +27,6 @@ export const standardFieldDisplayOptions: FieldDisplayOptions = {
   values: false,
   calcs: [ReducerID.mean],
   defaults: {
-    min: 0,
-    max: 100,
     thresholds: [
       { value: -Infinity, color: 'green' },
       { value: 80, color: 'red' }, // 80%