SharedQuery: don't explode when missing logo (#20187)

* don't explode when missing logo

* add path to a real icon

public/app/features/expressions/ExpressionDatasource.ts

@@ -92,6 +92,12 @@ export const expressionDatasource = new ExpressionDatasourceApi({
 } as DataSourceInstanceSettings);
 expressionDatasource.meta = {
   id: ExpressionDatasourceID,
+  info: {
+    logos: {
+      small: 'public/img/icn-datasource.svg',
+      large: 'public/img/icn-datasource.svg',
+    },
+  },
 } as DataSourcePluginMeta;
 expressionDatasource.components = {
   QueryEditor: ExpressionQueryEditor,

public/app/plugins/datasource/dashboard/plugin.json

@@ -2,7 +2,6 @@
   "type": "datasource",
   "name": "-- Dashboard --",
   "id": "dashboard",
-  "state": "alpha",
 
   "builtIn": true,
   "metrics": true