Update documentation on DevTools application entrypoints

Updates the location as well as the purpose of each entrypoint.

As a drive-by fix, the command prompt for showing the Node sources in
the Sources panel is corrected from "Node" to "Show Node".

Bug: none
Change-Id: I6d76bfb190925d3eb624c775fe134eda1b10b5f7
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3964271
Reviewed-by: Benedikt Meurer <[email protected]>
Commit-Queue: Andres Olivares <[email protected]>
Reviewed-by: Nancy Li <[email protected]>
diff --git a/front_end/entrypoints/node_app/node_app.ts b/front_end/entrypoints/node_app/node_app.ts
index fa5f31a..7c4b849 100644
--- a/front_end/entrypoints/node_app/node_app.ts
+++ b/front_end/entrypoints/node_app/node_app.ts
@@ -34,7 +34,7 @@
   /**
    *@description Command for showing the 'Node' tool in the Network Navigator View, which is part of the Sources tool
   */
-  showNode: 'Node',
+  showNode: 'Show Node',
 };
 
 const str_ = i18n.i18n.registerUIStrings('entrypoints/node_app/node_app.ts', UIStrings);