ensure yaml UI output is formatted correctly

fixes #1847 Ensure main and Settings aren't shown on the puppetclasses page linked to from the host page

fixes #1825 - unable to select an openstack image.

Note that probably Fog 1.5 is required for this to work.

Fixed typo in the word 'associations'

The new form should save 'New compute resource'

fixes #1840 Only show the help button if a help page exists

refs #1843 normally facts base hash has no certname.

this will make sure we don't fetch the wrong host (without a certname) by mistake.

fixes #1849 - Add the current hostgroup name when editing

make sure user expire when editing the user or when logging out

minor SQL improvments