refs: cf514cdf7
- in commit cf514cdf7 we moved the loadSettings call up to the bridge
- here we can call the async method, so we can remove loadSettingsSync altogether
- all the tests have now been changed to use the async method
refs: https://github.com/TryGhost/Toolbox/issues/228
- we are getting rid of the concept of api versions from Ghost
- this means getting rid of them from the frontend as well, and from themes
- the route settings code was factored out into its own service, but the tests were not moved
- this moves them so it's clearer what tests are for what service
