Based on a javascript in https://jira.atlassian.com/browse/JRA-13079 created by Brian Mortenson I created a javascript snippet that you can paste into your announcement banner.
This will allow users easy access to show the list of all subtasks in the issue-navgiator.
From there you can use bulk change as usual.
My users are very happy with this, so I just thought I'd share it were with you.
Kudos to Brian of course!
<script type="text/javascript">
AJS.$(document).ready(function(){
var matches = location.pathname.match(/browse\/([A-Z]+-[0-9]+)/),
list, id, item, link;
if (matches){
id = matches[1];
list = document.getElementById('subtask-view-options');
if (list) {
link = document.createElement('a');
link.href = '/issues/?jql=parent%20%3D%20' + id,
link.className = 'aui-list-checked aui-list-item-link',
link.title = 'Show and edit subtasks in navigator',
link.innerHTML = 'Edit All';
item = document.createElement('li');
item.className = 'aui-list-item';
list.appendChild(item);
item.appendChild(link);
}
}
})
</script>