Tests with '/' as part of the name aren't handled correctly

[jwosty]

E.g.

This happens because the extension gets a flat list of tests (names concatenated with slashes) from the external test runner, and therefore can't tell the different between a real slash that was inserted to indicate hierarchy, and a slash that's actually just part of the tests's name. See: /MonoDevelop.UnitTesting.Expecto/ExpectoTestSuites.fs#L251

Possible solutions:

• Escape slashes in test names in the external test runner (this feels a little dirty but would work)
• Send the tests back to the client in a tree form (can't use the actual Expecto.Test since this isn't serializable, so we'd have to define our own Test tree type that mirrors it, but without the Expecto.TestCode)
• Change FlatTestInfo.name to be name: string list instead of name: string, where each element is the hierarchy. (Of course code will have to be changed in the test runner to create the correct structure)