Allow Cmd-Enter as run-code shortcut in sandbox

Author: marijnh

html/js/code.js

@@ -2,7 +2,8 @@ addEventListener("load", () => {
   let editor = CodeMirror.fromTextArea(document.querySelector("#editor"), {
     mode: "javascript",
     extraKeys: {
-      "Ctrl-Enter": runCode
+      "Ctrl-Enter": runCode,
+      "Cmd-Enter": runCode
     },
     matchBrackets: true,
     lineNumbers: true

html/js/ejs.js

@@ -67,6 +67,7 @@ window.addEventListener("load", () => {
   let keyMap = {
     Esc(cm) { cm.display.input.blur() },
     "Ctrl-Enter"(cm) { runCode(cm.state.context) },
+    "Cmd-Enter"(cm) { runCode(cm.state.context) },
     "Ctrl-`"(cm) { closeCode(cm.state.context) },
     "Ctrl-Q": resetSandbox
   }