Editor feature page override with button images (#521)

* Editor feature page override with button images

* Update the 'about' a bit

* Bold the 'drivename'

* Add a ref to the editor features page in about

docs/about/editor-features.md

@@ -0,0 +1,72 @@
+# @extends
+
+#### #blocks-images
+
+| |
+|-|
+| ![Blocks Toolbox with Loops shelf open](/static/about/blocks-toolbox.png) |
+| Blocks Toolbox |
+
+#### #home-images
+
+| |
+|-|
+| ![Home button](/static/about/home-button.png) |
+| Home Button |
+
+#### #share-images
+
+| |
+|-|
+| ![Share button](/static/about/share-button.png) |
+| Share Button |
+
+#### #blocksjs-images
+
+| |
+|-|
+| ![Switch from Blocks to JavaScript](/static/about/blocks-to-js.gif) |
+| Switch from Blocks to JavaScript |
+
+#### #help-images
+
+| |
+|-|
+| ![Help button](/static/about/help-button.png) |
+| Help Button |
+
+#### #moresettings-images
+
+| |
+|-|
+| ![More settings button](/static/about/more-settings.png) |
+| More Button |
+
+#### #undoredo-images
+
+| | | |
+|-|-|-|
+| ![Undo button](/static/about/undo-button.png) | | ![Redo button](/static/about/redo-button.png) |
+| Undo Button | | Redo Button |
+
+#### #zoom-images
+
+| | | |
+|-|-|-|
+| ![Zoom in button](/static/about/zoom-in.png) | | ![Zoom out button](/static/about/zoom-out.png) |
+| Zoom In | | Zoom Out |
+
+#### #saveproject-images
+
+| |
+|-|
+| ![Save project field](/static/about/save-project.png) |
+| Save Project |
+
+#### #download-images
+
+| |
+|-|
+| ![Download button](/static/about/download-button.png) |
+| Download Button |
+