fix: #9767 ACP change group icon fix

public/less/admin/manage/groups.less

@@ -35,4 +35,18 @@
 	[component="category/list"] li {
 		cursor: pointer;
 	}
+	
+	.fa-nbb-none {
+		border: 1px dotted black;
+		height: 35px;
+		width: 35px;
+	}
+
+	.fa-icons .fa-nbb-none {
+		vertical-align: -6px;
+	}
+
+	#group-icon-preview.fa-nbb-none {
+		display: none;
+	}
 }