JIRA link in Confluence is missing CSS in JIRA Activity stream

You can reproduce the issue by inserting a link manually or by pasting a JIRA issue URL:

1. Paste into a wiki page an URL of a JIRA issue. Awesome Paste will kick in and convert it to a JIRA issue macro. The page displays the JIRA issue macro correctly.
2. Go to JIRA's dashboard page and locate the corresponding Activity Stream feed. We will see the display there looks strange - there are repetitive icons in front and at the rear of the issue link.

The problem is that the common.css styles are not available in the Activity stream, so the background-repeat and padding-left (for example) are not being set correctly on the rendered spans with icons.