fix typos; add better comment on SUPPORTED_PROPERTIES

Author: oslego

src/extensions/default/CSSShapesEditor/LiveEditorLocalDriver.js

@@ -158,7 +158,7 @@ define(function (require, exports, module) {
     * Promises can fail if the user manually refreshes the page or navigates
     * because the injected editor files will be lost.
     *
-    * @param {Object=} result promise result
+    * @param {$.Promise=} result promise result
     */
     function _whenRemoteCallFailed(result) {
         if (result) {

src/extensions/default/CSSShapesEditor/LiveEditorRemoteDriver.js

@@ -51,7 +51,7 @@
      *
      * @param {!HTMLElement} element
      * @param {!string} property CSS property
-     * @param {!string} valuem CSS property value
+     * @param {!string} value CSS property value
      *
      * @return {boolean}
      */

src/extensions/default/CSSShapesEditor/main.js

@@ -59,7 +59,7 @@ define(function (require, exports, module) {
         Model               = require("Model"),
         LiveEditorDriver    = require("LiveEditorLocalDriver");
 
-    // Update if you add editors for new properties
+    // TODO: Keep this list up to date with newly added/supported properties
     var SUPPORTED_PROPS = ["shape-inside", "-webkit-shape-inside", "shape-outside", "-webkit-shape-outside"];
 
     // Intentional bias towards only -webkit-clip-path (prefixed),