Search returns help from the wrong versions

[matthewpaulthomas]

1. Go to the help for a particular Maas version, for example 2.2.
2. Search for something that Maas has covered for multiple versions, for example “block devices”.

What happens: The results are a muddle of help for various versions. For example, the “block devices” results are from version 2.5, 1.9, 2.5, 2.1, 2.5, 1.9, 2.5, 1.9, 2.0…

What should happen: The results should be only for the version that you are searching from.

[matthewpaulthomas]

This issue has a Juju equivalent, jujucharms.com#467.