Add support for optionally rendering components versions section #15
Description
By default the course-ui expects there to be a section that displays all the versions of the documentation. See:
But consumers of the course-ui, such as the kubernetes-tutorial, don't use the component version section. To hide it, that repo needs to add supplemental ui.
Better would be to take the changes in this commit and apply them generically to the course-ui. It adds a page attribute that can drive whether component versions should be shown at the bottom of the nav or not.