Editor: Add selected tile, tool help, and hint editing; clean up toolbar style

index.html

@@ -199,18 +199,11 @@
         </div>
         <nav class="controls">
             <div id="editor-tile">
-                <!-- tools go here -->
-            </div>
-            <div id="editor-toolbar">
-                <!-- tools go here -->
             </div>
             <div class="-buttons">
                 <button id="editor-share-url" type="button">Share?</button>
                 <button id="editor-toggle-green" type="button">Toggle green objects</button>
             </div>
-            <div id="editor-tool-help">
-                <strong>Pencil</strong> — <span>Select a tile and draw with the left mouse button.  Erase with the right mouse button.</span>
-            </div>
             <!--
             <p style>
                 Tip: Right click to color drop.<br>