Plan branches with multiple repositories disallows changes to secondary repo branch.

Summary

When more than 1 plan branch is present, only the first plan allows you to specify a repository. A "Password cannot be empty" error is thrown.

Environment

• Bamboo 6.4.0
• Windows

Steps to Reproduce

1. Add a Bitbucket repository using Username and Password to authenticate
2. Create Plan Branch
3. Navigate to Branch settings
4. Observe that the "Branch" dropdown does not have proper branches listed

Expected Results

Should be able to select the desired branch.

Actual Results

The branch drop-down should be disabled and shown under the Change repository settings for this branch plan

Workaround

Specify the password by navigating to "Change repository settings for this branch plan"