Bug 32146: Add page-section to course reserves

Bug 32146: Add page-section to course reserves

This patch adds a "page-section" wrapping div to two Course Reserves
templates.

Note: This patch contains indentation changes.

To test, apply the patch and go to Course Reserves.

 - The table of course reserves should appear in a white section.
 - View the details of a course: There should be a white section for the
   list of details at the top and another for the table of reserves.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>