fix #2249 set index to 1061

src/layouts/Header.less

@@ -2,6 +2,7 @@
   position: fixed;
   top: 0;
   width: 100%;
-  z-index: 9;
+  // > @zindex-tooltip
+  z-index: 1061;
   transition: width 0.2s;
 }