I've just moved from Mac to Windows, and I'm used to being able to click the username/password field to copy it. On Windows, you have to click on the copy icon at the right hand side of that line, which is about 6 inches away on my monitor. Any chance of making it work the same way so you can just click the field you want to copy instead of the button?
1Password Version: 6.4.377d
Extension Version: Not Provided
OS Version: Windows 10
Sync Type: 1Password