PLT-6520 Add RhsDropdownButton component to avoid React-Bootstrap warning (#6405)

webapp/components/rhs_dropdown.jsx

@@ -1,24 +1,28 @@
 // Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
-import * as Agent from 'utils/user_agent.jsx';
+import React, {Component, PropTypes} from 'react';
+import {Dropdown} from 'react-bootstrap';
+
+import RhsDropdownButton from 'components/rhs_dropdown_button.jsx';
 import RhsDropdownMenu from 'components/rhs_dropdown_menu.jsx';
 
-import {Dropdown} from 'react-bootstrap';
-import React from 'react';
+import * as Agent from 'utils/user_agent.jsx';
+
+export default class RhsDropdown extends Component {
+    static propTypes = {
+        dropdownContents: PropTypes.array.isRequired
+    }
 
-export default class RhsDropdown extends React.Component {
     constructor(props) {
         super(props);
 
-        this.toggleDropdown = this.toggleDropdown.bind(this);
-
         this.state = {
             showDropdown: false
         };
     }
 
-    toggleDropdown() {
+    toggleDropdown = () => {
         const showDropdown = !this.state.showDropdown;
         if (Agent.isMobile() || Agent.isMobileApp()) {
             const scroll = document.querySelector('.scrollbar--view');
@@ -39,9 +43,7 @@ export default class RhsDropdown extends React.Component {
                 open={this.state.showDropdown}
                 onToggle={this.toggleDropdown}
             >
-                <a
-                    href='#'
-                    className='post__dropdown dropdown-toggle'
+                <RhsDropdownButton
                     bsRole='toggle'
                     onClick={this.toggleDropdown}
                 />
@@ -53,6 +55,3 @@ export default class RhsDropdown extends React.Component {
     }
 }
 
-RhsDropdown.propTypes = {
-    dropdownContents: React.PropTypes.array.isRequired
-};

webapp/components/rhs_dropdown_button.jsx

@@ -0,0 +1,20 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import React, {PropTypes, PureComponent} from 'react';
+
+export default class RhsDropdownButton extends PureComponent {
+    static propTypes = {
+        onClick: PropTypes.func.isRequired
+    }
+
+    render() {
+        return (
+            <a
+                href='#'
+                className='post__dropdown dropdown-toggle'
+                onClick={this.props.onClick}
+            />
+        );
+    }
+}