The extension uses the custom field password instead of the main password

### Steps To Reproduce 1. Create any entry with a username and password. 2. Create a custom field named "Password". 3. Use the extension's autofill feature. ### Expected Result The extension autofills the main username and password instead of the custom field. ### Actual Result The extension uses the username and password from the custom field. ### Screenshots or Videos _No response_ ### Additional Context _No response_ ### Operating System Windows ### Operating System Version _No response_ ### Web Browser Chrome ### Browser Version _No response_ ### Environment Versions Version: 2026.7.0 SDK: 'main (3e060f8)' Server version: 2026.7.2 ### Issue Tracking Info - [x] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.