Merge pull request #1141 from ericrosenbaum/feature/extension-id-in-toolbox

Add extension id to toolbox category XML

src/engine/runtime.js

@@ -839,7 +839,7 @@ class Runtime extends EventEmitter {
             const menuIconXML = menuIconURI ?
                 `iconURI="${menuIconURI}"` : '';
 
-            xmlParts.push(`<category name="${name}" ${colorXML} ${menuIconXML}>`);
+            xmlParts.push(`<category name="${name}" id="${categoryInfo.id}" ${colorXML} ${menuIconXML}>`);
             xmlParts.push.apply(xmlParts, paletteBlocks.map(block => block.xml));
             xmlParts.push('</category>');
         }