(front) Autocomplete search on dashboard with Datalist

Create Elasticsearch service to search suggestions

Send to page when choose a suggestion - bad way
It's impossible to use Object with datalist
So it's impossible to distinguish an album from an artist if they have
the same name

dashboard/src/app/model/suggested.ts

@@ -0,0 +1,8 @@
+export class Suggested {
+    name: string;
+    type: string;
+
+    public toString() : string {
+        return `${this.name} (${this.type})`;
+    }
+}