Fixed dashboard error in tests
Fixed dashboard error in tests

refs https://github.com/TryGhost/Team/issues/1164

- the dashboard was still linking to the old theme setting routes but those have now been disabled to allow for the theme install redirect route to live in the same place
- removed the old links as they are scheduled for removal as part of the `customThemeSettings` labs flag cleanup anyway

TryGhost/Ghost,TryGhost/Ghost,TryGhost/Ghost