bb-config.php local fixes
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Fix course clone option greying, and add inline docs

The Clone A Site options should be disabled when the source course has
no site to clone; likewise, they should be un-disabled when the source
course *does* have a site to clone.

See 3d4aa3de for original implementation

See #952
Whitespace
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
When clicking "New Topic", toggle "Sorry, no topics" message

See #951
Re-adds plugin: Grader. See #914, #950, #949
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
Fixes comment privacy in Grader plugin

The Grader plugin was using the 'comments_array' filter to protect
@grade comments from appearing to non-authorized users. However, this
technique only works when 'comments_array' is called, which only happens
when the comments template is called. Thus, direct calls to comments -
such as those using get_comments(), like on Recent Site Comments widgets
- miss the filter entirely.

We work around the problem by filtering at the_comments as well.

Note: This is only a reliable method if Grader is also activated on
the main site, where it'll be able to catch BuddyPress content.

See #949
Whitespace in Grader plugin
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x
First pass at fixing activation redirects from Microsoft mail

See #957
Update plugin: WP-DPLA. Fixes #960
Whitespace
Reorders Semester dropdown items

See #962