I want to add some inline help to the New mailing CiviMail. e.g. show a block on this page civicrm/a/#/mailing/12345
I've created my drupal block, set it to appear in the correct theme and set it to only display on this page: civicrm/a/#/mailing/*
However for some reason it won't show. I've backtracked and I'm able to get it to show up with this expression: civicrm/* but as soon as I add civicrm/a/* it doesn't work, just doesn't display
Any ideas about why this might be?