Add peek/pop to profile headers

Tusker/Views/Profile Header/ProfileHeaderTableViewCell.swift

@@ -112,3 +112,15 @@ class ProfileHeaderTableViewCell: UITableViewCell, PreferencesAdaptive {
     }
     
 }
+
+extension ProfileHeaderTableViewCell: PreviewViewControllerProvider {
+    func getPreviewViewController(forLocation location: CGPoint, sourceViewController: UIViewController) -> UIViewController? {
+        let noteLabelPoint = noteLabel.convert(location, from: self)
+        if noteLabel.bounds.contains(noteLabelPoint),
+            let vc = noteLabel.getViewController(forLinkAt: noteLabelPoint) {
+            return vc
+        }
+        // TODO: should this also have peek/pop for avatar/header images?
+        return nil
+    }
+}