replace placeholder icon with real icon from Alan

interface/resources/icons/create-icons/142-grid-01.svg

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 22.0.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+<path d="M448.8,273.5c8.3,0,15-6.7,15-15s-6.7-15-15-15h-42.3V137.5h42.3c8.3,0,15-6.7,15-15s-6.7-15-15-15h-42.3V67.1
+	c0-8.3-6.7-15-15-15s-15,6.7-15,15v40.3H276.3V67.1c0-8.3-6.7-15-15-15s-15,6.7-15,15v40.3H142.2V67.1c0-8.3-6.7-15-15-15
+	s-15,6.7-15,15v40.3H70.9c-8.3,0-15,6.7-15,15s6.7,15,15,15h41.3v106.1H70.9c-8.3,0-15,6.7-15,15s6.7,15,15,15h41.3v104.1H70.9
+	c-8.3,0-15,6.7-15,15s6.7,15,15,15h41.3V448c0,8.3,6.7,15,15,15s15-6.7,15-15v-40.3h104.1V448c0,8.3,6.7,15,15,15s15-6.7,15-15
+	v-40.3h100.1V448c0,8.3,6.7,15,15,15s15-6.7,15-15v-40.3h42.3c8.3,0,15-6.7,15-15s-6.7-15-15-15h-42.3V273.5H448.8z M376.4,137.5
+	v106.1H276.3V137.5H376.4z M142.2,137.5h104.1v106.1H142.2V137.5z M142.2,377.7V273.5h104.1v104.1H142.2z M376.4,377.7H276.3V273.5
+	h100.1V377.7z"/>
+</svg>

interface/resources/qml/hifi/tablet/EditTabView.qml

@@ -192,7 +192,7 @@ TabBar {
                         }
                         
                         NewEntityButton {
-                            icon: "icons/create-icons/21-cube-01.svg"
+                            icon: "icons/create-icons/142-grid-01.svg"
                             text: "GRID"
                             onClicked: {
                                 editRoot.sendToScript({

interface/resources/qml/hifi/tablet/EditToolsTabView.qml

@@ -198,7 +198,7 @@ TabBar {
                         }
                         
                         NewEntityButton {
-                            icon: "icons/create-icons/21-cube-01.svg"
+                            icon: "icons/create-icons/142-grid-01.svg"
                             text: "GRID"
                             onClicked: {
                                 editRoot.sendToScript({

scripts/system/html/js/includes.js

@@ -10,7 +10,7 @@
 
 const ENTITY_TYPE_ICON = {
     Box: "m",
-    Grid: "m",
+    Grid: "",
     Image: "",
     Light: "p",
     Material: "",