Skipped tests should not use "unstable" coloring

Scope

• Change skipped tests to use the "not built" style and status indicator instead of the yellow "unstable" style and status indicator

Original request
In an unstable build, there can be

• failed tests
• skipped tests

The skipped tests are the same color and icon as the overall build (orange and ! ) while the tests that actually made the build unstable are red and x. This makes no sense, as it implies a relationship between build status and skipped tests that's just not there.