fix: tooltip issue about customer follower

change: Grid.export optimized (compression with `deflate`)
feature: ui-tab
feature: Popup.closable

lib/ui.js

@@ -4,6 +4,7 @@ import { createElement } from "./functions";
 import { createIcon, changeIcon, resolveIcon } from "./ui/icon";
 import { createCheckbox, createRadiobox, resolveCheckbox } from "./ui/checkbox";
 import { setTooltip, resolveTooltip } from "./ui/tooltip";
+import { createTab } from "./ui/tab";
 import { Dropdown } from "./ui/dropdown";
 import { Grid } from "./ui/grid/grid";
 import { GridColumn, GridInputColumn, GridDropdownColumn, GridCheckboxColumn, GridIconColumn, GridTextColumn, GridDateColumn } from './ui/grid/column';
@@ -25,6 +26,8 @@ export {
   // tooltip
   setTooltip,
   resolveTooltip,
+  // tab
+  createTab,
   // dropdown
   Dropdown,
   // grid