Hide not run browser tests from docs

[JDawes-ScottLogic]

Tests that are not run for the browser are included in the documentation
for a method, showing as 0/x. This change is to only include tests for
the browser when we have actually run some tests.

Linked to #272

[ghost]

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[BenLambertNcl]

Think that will look a lot nicer! Thanks!

[ghost]

Thank you for your pull request and welcome to our community! We require contributors to sign our Contributor License Agreement and we don't seem to have you on file. In order for us to review and merge your code, please follow the link above and follow the instructions. If you have questions or believe you've received this message in error, don't hesitate to contact Aaron Williamson, our General Counsel and Director of Governance.

CLA has not been signed by users @JDawes-ScottLogic