Land on Blogs page when SimpleNav is enabled

This shows the Blogs page instead of the Editor to logged in users on
the `/` path when the new `simple_nav` config option is enabled.

Ref T680

app.go

@@ -193,7 +193,12 @@ func handleViewHome(app *App, w http.ResponseWriter, r *http.Request) error {
 		// Show correct page based on user auth status and configured landing path
 		u := getUserSession(app, r)
 		if u != nil {
-			// User is logged in, so show the Pad
+			// User is logged in, so show the Pad or Blogs page, depending on config
+			if app.cfg.App.SimpleNav {
+				// Simple nav, so home page is Blogs page
+				return viewCollections(app, u, w, r)
+			}
+			// Default config, so home page is editor
 			return handleViewPad(app, w, r)
 		}
 

config/config.go

@@ -68,6 +68,7 @@ type (
 		JSDisabled bool   `ini:"disable_js"`
 		WebFonts   bool   `ini:"webfonts"`
 		Landing    string `ini:"landing"`
+		SimpleNav  bool   `ini:"simple_nav"`
 
 		// Users
 		SingleUser       bool `ini:"single_user"`