Bug with WebHelp links not working correctly for related attributes

[jordanpadams]

🐛 Describe the bug

The Img.Exposure class contains a reference to the exposure_count that, when clicked, takes you
the the msss_cam_mh exposure_count, instead of the img exposure count.
This is a problem because they have different definitions.

https://pds.nasa.gov/datastandards/documents/dd/current/PDS4_PDS_DD_1I00/webhelp/all/

📜 To Reproduce

1. https://pds.nasa.gov/datastandards/documents/dd/current/PDS4_PDS_DD_1I00/webhelp/all/
2. Go to Classes in img namespace
3. Select Exposure
4. Select exposure_count attribute
5. Note per left panel, you are dropped into the msss_cam_mh namespace: https://pds.nasa.gov/datastandards/documents/dd/current/PDS4_PDS_DD_1I00/webhelp/all/#ch25.html

🕵️ Expected behavior

Keeps you in the IMG namespace