[share links admin dialog] added 'empty tip' (#4474)

frontend/src/components/empty-tip.js

@@ -2,11 +2,16 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { mediaUrl } from '../utils/constants';
 
+const propTypes = { 
+  forDialog: PropTypes.bool,
+  children: PropTypes.object.isRequired
+};
+
 class EmptyTip extends React.Component {
 
   render() {
     return (
-      <div className="empty-tip">
+      <div className={this.props.forDialog ? 'text-center mt-8' : 'empty-tip'}>
         <img src={`${mediaUrl}img/no-items-tip.png`} alt="" width="100" height="100" className="no-items-img-tip" />
         {this.props.children}
       </div>
@@ -14,4 +19,6 @@ class EmptyTip extends React.Component {
   }
 }
 
+EmptyTip.propTypes = propTypes;
+
 export default EmptyTip;