Bug 1796588: Adding a 'loading' message for timeline

In case there are a lot of versions and/or versions have slow loading
blocks

behatnotneeded

Change-Id: Idc7f1eeca76f10a22a76c11a5e2e22bfd82f0858
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
(cherry picked from commit c1ffd707)

htdocs/lang/en.utf8/view.php

@@ -532,3 +532,4 @@ $string['nextversion'] = 'Next version';
 $string['versionnumber'] = 'Version %s';
 $string['gotonextversion'] = 'Go to the next version ';
 $string['gotopreviousversion'] = 'Go to the previous version';
+$string['loadingtimelinecontent'] = 'Loading timeline for "%s". If the page has many versions, this may take a while.';

htdocs/theme/raw/templates/view/versioning.tpl

@@ -10,7 +10,7 @@
 <div class="grouppageswrap view-container">
     {$timelineform|safe}
 {if $views}
-    <div class="jtline"></div>
+    <div class="jtline"><span class="icon icon-spinner icon-pulse"></span> {str tag=loadingtimelinecontent section=view arg1=$viewtitle}</div>
     <script type="application/javascript">
     $(function () {
         var jtLine = $('.jtline').jTLine({

htdocs/view/versioning.php

@@ -66,5 +66,6 @@ $smarty->assign('fromdate', urlencode($fromdate));
 $smarty->assign('todate', urlencode($todate));
 $smarty->assign('viewurl', $viewobject->get_url());
 $smarty->assign('view', $view);
+$smarty->assign('viewtitle', hsc($viewobject->get('title')));
 $smarty->assign('headingclass', 'page-header');
 $smarty->display('view/versioning.tpl');