CORE-4067 Revert "core-4063 make data link warning msg more prominent."

This reverts commit d177540571759e18bdd4c6742b9e1bcc602d2c0c in order to remove the duplicate message.
CORE-4067 Updated data link warning message.

Added styles from CORE-4063 (d177540571759e18bdd4c6742b9e1bcc602d2c0c) to the warning message in DataLinkPanel.ui.xml.