OZG-1586 remove opacity from mail head

goofy-client/libs/postfach/src/lib/postfach-mail-list-container/postfach-mail-list/postfach-mail/outgoing-mail/outgoing-mail.component.scss

@@ -41,7 +41,6 @@ a {
 	display: flex;
 	white-space: nowrap;
 	align-items: center;
-	opacity: 0.4;
 
 	::ng-deep {
 		goofy-client-user-icon {