Ftw-footer

------------------

- Nothing changed yet.

------------------

- Remove CSS rule for columns which was creating a new stacking context
Looks like it was unnecessary for ftw.footer anyway.
Fixes https://github.com/4teamwork/izug.organisation/issues/1762
[djowett-ftw]

------------------

- Add support for Plone 5.1.x. [mbaechtold]

- Drop support for Plone 4.2.x. [mbaechtold]

- Fix tests for Plone 5 [busykoala, djowett-ftw]

- Disable manage-footer view on Plone 5, since Plone 5 provides the means to
edit any portlet manager through the Manage portlets menu item. [djowett-ftw]

- Accommodate the Grid system in Plone 5 (12 column bootstrap grid, instead of
16 column Deco.gs) [djowett-ftw]

------------------

- Enable the footer on non-contentish items.
[lknoepfel]

------------------

- CSS adjustment for compatibility with newer plonetheme.blueberry.
[Kevin Bieri]

------------------

- Use alternate color for links in the footer.
Remove border below the footer portlets.
[Kevin Bieri]

- Adapt footer styling based on ftw.theming rework.
[Kevin Bieri]

- Implement responsive footer according the latest ftw.theming implementation.
[mathias.leimgruber]

- Translate the lawgiver action group to be used in German workflow specifications.
[mbaechtold]