perf: use overflow: clip instead of hidden

src/client/pages/settings/theme.vue

@@ -184,7 +184,8 @@ export default defineComponent({
 			position: absolute;
 			top: 50%;
 			left: 50%;
-			overflow: hidden;
+			overflow: hidden; // overflow: clip; をSafariが対応したら消す
+			overflow: clip;
 			padding: 0 100px;
 			transform: translate3d(-50%, -50%, 0);