Fixes #5162/BZ1096407 - fix setting of sync time for new sync plans.
Fixes #5552/BZ1093751 - Prevent sorting on columns that aren't sortable.
Merge pull request #4232 from waldenraines/5162

Fixes #5162/BZ1096407 - fix setting of sync time for new sync plans.
Merge pull request #4235 from waldenraines/5552

Fixes #5552/BZ1093751 - Prevent sorting on columns that aren't sortable.
fixes #6144 - fix css formatting formatting fields on katello form builder to bootstrap3
fixes #6145 - add pulp proxy to host form
fixes #6156 - refactor OperatingsystemExtensions to RedhatExtensions and refactor MediumExtensions