LP1917092: Filter shelving location grid to non-deleted by default

LP1917092: Filter shelving location grid to non-deleted by default

To test:

1) Go to Admin > Local admin > Shelving locations editor.
2) Note that there is a filter enabled: Deleted = No.
3) Check through the grid entries to confirm that no deleted locations exist in the grid.
4) Remove the filter.
5) Note that the deleted entries are now available to you if you need them.

Signed-off-by: Jane Sandberg <js7389@princeton.edu>
Signed-off-by: Elizabeth Thomsen <et@noblenet.org>
Signed-off-by: Michele Morgan <mmorgan@noblenet.org>