OZG-4527 set icon to white on text enter

alfa-client/libs/vorgang-detail/src/lib/aktenzeichen-edit-dialog/aktenzeichen-edit-dialog.component.scss

@@ -32,6 +32,10 @@
 :host-context(.dark) {
 	.az_icon {
 		color: $darkModeGreyLight;
+
+		&--active {
+			color: white;
+		}
 	}
 }