Merge lp:~ya-bo-ng/resource-centre/add-webinar-mailing-list into lp:resource-centre

[Anthony Dillon]

## Done
Added a checkbox for webinars when subscribing to the mailing list.

## QA
Run the code and open the homepage. There should be a checkbox for webinars on the right-hand side. Click on a category and see that only that cat and webinar is auto selected.

## Demo
http://insights.canonicalwebteam.com/

[David Callé (davidc3)]

lgtm!

review: Approve

=== modified file 'includes/_digest.php'
--- includes/_digest.php	2017-04-06 07:29:37 +0000
+++ includes/_digest.php	2017-10-17 15:17:06 +0000
@@ -27,6 +27,10 @@
             <input class="mktoLogicalField mktoCheckboxList mktoHasWidth" type="checkbox" id="insightsiot" name="insightsiot" value="yes"<?php if(in_array('internet-of-things', $termsString) or $current_tax == 'internet-of-things' or is_home() or is_page_template( 'page-press.php' )) echo ' checked="checked" ' ?>/>
             <label for="insightsiot">Internet of Things</label>
           </li>
+          <li>
+            <input class="mktoLogicalField mktoCheckboxList mktoHasWidth" type="checkbox" id="insightswebinar" name="insightswebinar" value="yes" checked="checked" />
+            <label for="insightswebinar">Webinars</label>
+          </li>
         </ul>
       </li>
       <li  class="mktFormReq mktField">
@@ -38,7 +42,7 @@
       </li>
       <li  class="mktField">
         <span class='mktoButtonWrap'><button type='submit' class='mktoButton'>Subscribe now</button></span>
-        
+
         <input value="1959" class="mktoField mktoFieldDescriptor" name="lpId" type="hidden">
         <input value="30" class="mktoField mktoFieldDescriptor" name="subId" type="hidden">
         <input type="hidden" name="lpurl" value="https://pages.canonical.com/Insights-Subscription_Insights-Subscription-test.html?cr={creative}&amp;kw={keyword}" />