Fixed #22

Added a "help..." item to the context menus of the "Make a variable," "Delete a variable," and "Make a block" buttons which displays the appropriate help screen

objects.js

@@ -1410,6 +1410,12 @@ SpriteMorph.prototype.blockTemplates = function (category) {
         );
     }
 
+    function helpMenu() {
+        var menu = new MenuMorph(this);
+        menu.addItem('help...', 'showHelp');
+        return menu;
+    }
+
     if (cat === 'motion') {
 
         blocks.push(block('forward'));
@@ -1686,6 +1692,9 @@ SpriteMorph.prototype.blockTemplates = function (category) {
             },
             'Make a variable'
         );
+        button.userMenu = helpMenu;
+        button.selector = 'addVariable';
+        button.showHelp = BlockMorph.prototype.showHelp;
         blocks.push(button);
 
         if (this.variables.allNames().length > 0) {
@@ -1704,6 +1713,9 @@ SpriteMorph.prototype.blockTemplates = function (category) {
                 },
                 'Delete a variable'
             );
+            button.userMenu = helpMenu;
+            button.selector = 'deleteVariable';
+            button.showHelp = BlockMorph.prototype.showHelp;
             blocks.push(button);
         }
 
@@ -1770,6 +1782,9 @@ SpriteMorph.prototype.blockTemplates = function (category) {
             },
             'Make a block'
         );
+        button.userMenu = helpMenu;
+        button.selector = 'addCustomBlock';
+        button.showHelp = BlockMorph.prototype.showHelp;
         blocks.push(button);
     }
     return blocks;