Merge pull request #247 from AvaloniaUI/adding-missing-nav-emojis

Added missing navigation emojis

SUMMARY.md

@@ -160,8 +160,8 @@
     * [View Activation](guides/deep-dives/reactiveui/view-activation.md)
     * [Routing](guides/deep-dives/reactiveui/routing.md)
     * [Data Persistence](guides/deep-dives/reactiveui/data-persistence.md)
-* [Developer Guides](guides/developer-guides/README.md)
-  * [🏭 Build Avalonia from Source](guides/developer-guides/build-avalonia-from-source.md)
+* [📚 Developer Guides](guides/developer-guides/README.md)
+  * [Build Avalonia from Source](guides/developer-guides/build-avalonia-from-source.md)
   * [Comparison of Avalonia with WPF and UWP](guides/developer-guides/comparison-of-avalonia-with-wpf-and-uwp.md)
   * [Debugging Previewer](guides/developer-guides/debugging-previewer.md)
   * [Debugging the XAML compiler](guides/developer-guides/debugging-xamlil.md)
@@ -192,8 +192,8 @@
   * [Add Data Persistence](tutorials/music-store-app/add-data-persistence.md)
   * [Load data at Startup](tutorials/music-store-app/load-data-at-startup.md)
   * [Summary](tutorials/music-store-app/summary.md)
-* [Running in the Browser](tutorials/running-in-the-browser.md)
-* [Developing for Mobile](tutorials/developing-for-mobile/README.md)
+* [🌐 Running in the Browser](tutorials/running-in-the-browser.md)
+* [📱Developing for Mobile](tutorials/developing-for-mobile/README.md)
   * [Create a cross platform solution](tutorials/developing-for-mobile/create-a-cross-platform-solution.md)
   * [Android](tutorials/developing-for-mobile/android/README.md)
     * [Setting up your developer environment for Android](tutorials/developing-for-mobile/android/setting-up-your-developer-environment-for-android.md)