fix(account_page_header_dropdown_balances), fixes #940

[elmurci]

High Level Overview of Change

Fixes: https://github.com/ripple/explorer/issues/940

The token balances dropdown was adding obligations to the total balance, this has been removed.

Type of Change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (non-breaking change that only restructures code)
• [ ] Tests (You added tests for code that already exists, or your new feature included in this PR)
• [ ] Documentation Updates
• [ ] Translation Updates
• [ ] Release

[elmurci]

This might require a larger conversation about how to convey these two separate pieces of information.

Agree.