LP1796936: Add aria-labels to the checkboxes in web client grids

LP1796936: Add aria-labels to the checkboxes in web client grids

To test:
1) Go to an AngularJs grid interface.  Make sure that the "Select all"
checkbox has an aria-label attribute of "All rows"
2) In the same interface, make sure that each checkbox in the
non-header rows has an aria-label like "Row 15", "Row 23", etc.
3) Repeat steps 1-2 for an Angular grid interface.

Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>