LP1840982 Replace troublesome catalog icons

LP1840982 Replace troublesome catalog icons

Replace 'arrow_right' icon with 'keyboard_arrow_right' (ditto left) in
the Angular catalog holdings maintenance grid.  This resolves an issue
where the 'arrow_right' icon presents with excess padding, causing the
barcode / call number values to appear to be empty in the
'Location/Barcode' column of the holdings grid.

See also LP1830912 for icon padding issues.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>