improved dialogs (#4505)

* improved dialogs

* redesigned 'share' dialog and 'folder permission' dialog for mobile
* improved 'API token' dialog

* [dialogs] modification for mobile

* [dialogs] improvement & bugfix

frontend/src/components/dialog/sysadmin-dialog/sysadmin-share-dialog.js

@@ -42,7 +42,7 @@ class SysAdminShareDialog extends React.Component {
     return (
       <Fragment>
         <div className="share-dialog-side">
-          <Nav pills vertical>
+          <Nav pills>
             {enableDirPrivateShare &&
               <Fragment>
                 <NavItem>