Bug 26626: (follow-up) Update icon selection

Bug 26626: (follow-up) Update icon selection

This patch changes the "Ignore" button to use an X icon and the "Cancel"
button to use a "Trash" icon.

Signed-off-by: Barbara Johnson <barbara.johnson@bedfordtx.gov>
Signed-off-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit e62b8bde068dcac607f155d8267c2bc41cd4f023)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit e939769702e7ee9814873020829daf8ee513aba0)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>