Update image + TOC

Author: mgblythe

articles/data-explorer/media/power-bi-imported-query/edit-credentials.png

@@ -5,7 +5,6 @@
   - name: What is Data Explorer?
     href: data-explorer-overview.md
 - name: Quickstarts
-  expanded: true
   items:
   - name: Create a cluster - Azure portal
     href: create-cluster-database-portal.md
@@ -36,8 +35,10 @@
   - name: Visualize data - Power BI
     href: visualize-power-bi.md  
 - name: Concepts
+  expanded: true
   items:
   - name: Data ingestion overview
+    displayName: pipelines, connectors, plugins, Python, .NET, Java, Node, REST
     href: ingest-data-overview.md
   - name: Time series analysis
     href: time-series-analysis.md