[BB-2438] Override additional partials and the discussion bootstrap styles to fix styling issues


This PR adds additional partials to the default skeleton so that the styles get applied uniformly on bootstrap and non-bootstrap pages and also the discussion pages.

*Dependencies*: None

*Sandbox URL*: TBD - sandbox is being provisioned.

*Merge deadline*: None

*Testing instructions*:
1. Deploy an instance with the `simple_theme` role enabled and configured. Verify that SASS variables overrides and custom styles work.


  • [ ] @giovannicimolin

  • [ ] edX reviewer[s] TBD

Configuration Pull Request

Make sure that the following steps are done before merging:

  • [ ] A DevOps team member has approved the PR if it is code shared across multiple services and you don't own all of the services.

  • [ ] Are you adding any new default values that need to be overridden when this change goes live? If so:

  • [ ] Update the appropriate internal repo (be sure to update for all our environments)

  • [ ] If you are updating a secure value rather than an internal one, file a DEVOPS ticket with details.

  • [ ] Add an entry to the CHANGELOG.

  • [ ] If you are making a complicated change, have you performed the proper testing specified on the [Ops Ansible Testing Checklist](https://openedx.atlassian.net/wiki/display/EdxOps/Ops+Ansible+Testing+Checklist)? Adding a new variable does not require the full list (although testing on a sandbox is a great idea to ensure it links with your downstream code changes).

  • [ ] Think about how this change will affect Open edX operators. Have you updated the wiki page for the next Open edX release?


Jill Vogel


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Guruprasad Lakshmi Narayanan




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