grandlyon-sau: add new icons for menu entries (#65117)

static/grandlyon-sau/_custom.scss

@@ -325,7 +325,7 @@ div.cell > div {
 						background-repeat: no-repeat;
 					}
 				}
-				@each $category in (pass-perdu-ou-vole, pass-endommage, abonnement-expire, pass-non-recu) {
+				@each $category in (pass-perdu-ou-vole, pass-endommage, abonnement-expire, pass-non-recu, un-probleme, une-idee, une-aide) {
 					&.menu-#{$category} {
 						> a {
 							background-image: url('img/#{$category}.png');