Fix DevTools nits (google#5651)

src/content/en/tools/chrome-devtools/progressive-web-apps.md

@@ -23,10 +23,10 @@ guides](#other).
 
 
 ### TL;DR {: .hide-from-toc }
-- Use the <strong>App Manifest</strong> pane to inspect your web app manifest and trigger Add to Homescreen events.
-- Use the <strong>Service Worker</strong> pane for a whole range of service-worker-related tasks, like unregistering or updating a service, emulating push events, going offline, or stopping a service worker.
+- Use the <strong>Manifest</strong> pane to inspect your web app manifest and trigger Add to Homescreen events.
+- Use the <strong>Service Workers</strong> pane for a whole range of service-worker-related tasks, like unregistering or updating a service, emulating push events, going offline, or stopping a service worker.
 - View your service worker cache from the <strong>Cache Storage</strong> pane.
-- Unregister a service worker and clear all storage and caches with a single button click from the <strong>Clear Storage</strong> pane.
+- Unregister a service worker and clear all storage and caches with a single button click from the <strong>Clear storage</strong> pane.
 
 
 ## Web app manifest {:#manifest}

src/content/en/tools/chrome-devtools/shortcuts.md

@@ -39,6 +39,11 @@ on the browser viewport:
       <td><kbd>Command</kbd>+<kbd>Option</kbd>+<kbd>J</kbd></td>
       <td><kbd>Control</kbd>+<kbd>Shift</kbd>+<kbd>J</kbd></td>
     </tr>
+    <tr>
+      <td>Open the <b>Elements</b> panel</td>
+      <td><kbd>Command</kbd>+<kbd>Option</kbd>+<kbd>C</kbd></td>
+      <td><kbd>Control</kbd>+<kbd>Shift</kbd>+<kbd>C</kbd></td>
+    </tr>
   </tbody>
 </table>
 

src/content/en/tools/chrome-devtools/snippets.md

@@ -59,25 +59,6 @@ Console**, or use the keyboard shortcut
 
 ![evaluate in console](images/evaluate-in-console.png)
 
-## View local modifications
-
-<!-- TODO apply revision content doesn't really work... -->
-
-To view a diff of modifications you've made to a snippet, right-click in 
-the editor (while the snippet is displayed) and select **Local modifications**.
-
-![local modifications](images/local-modifications.png)
-
-A new tab named **History** pops up in the Console drawer.
-
-![snippet history](images/snippet-history.png)
-
-Each of the timestamps represent a modification. Expand the carat next to
-a timestamp to view a diff of the modifications at that point in time.
-The **revert** link removes the revision history. As of June 27, 2016 the
-**apply revision content** and **apply original content** links appear
-to not work as intended.
-
 ## Set breakpoints
 
 Just like other scripts, you can set breakpoints on snippets. See