Fixes related to coding style

react/features/base/react/components/Watermarks.web.js

-/* global APP, interfaceConfig */
+/* @flow */
 
 import React, { Component } from 'react';
 
+declare var APP: Object;
+declare var interfaceConfig: Object;
+
 /**
  * The CSS style of the element with CSS class <tt>rightwatermark</tt>.
+ *
+ * @private
  */
-const RIGHT_WATERMARK_STYLE = {
+const _RIGHT_WATERMARK_STYLE = {
     backgroundImage: 'url(images/rightwatermark.png)'
 };
 
  * etc.
  */
 export class Watermarks extends Component {
+    state = {
+        brandWatermarkLink: String,
+        jitsiWatermarkLink: String,
+        showBrandWatermark: Boolean,
+        showJitsiWatermark: Boolean,
+        showJitsiWatermarkForGuests: Boolean,
+        showPoweredBy: Boolean
+    };
+
     /**
      * Initializes a new Watermarks instance.
      *
      * @param {Object} props - The read-only properties with which the new
      * instance is to be initialized.
      */
-    constructor(props) {
+    constructor(props: Object) {
         super(props);
 
         let showBrandWatermark;
                     target = '_new'>
                     <div
                         className = 'watermark rightwatermark'
-                        style = { RIGHT_WATERMARK_STYLE } />
+                        style = { _RIGHT_WATERMARK_STYLE } />
                 </a>
             );
         }

react/features/conference/components/Conference.native.js

 
 /**
  * The timeout in milliseconds after which the toolbar will be hidden.
+ *
+ * @private
+ * @type {number}
  */
-const TOOLBAR_TIMEOUT_MS = 5000;
+const _TOOLBAR_TIMEOUT_MS = 5000;
 
 /**
- * The conference page of the application.
+ * The conference page of the mobile (i.e. React Native) application.
  */
 class Conference extends Component {
     /**
         this._clearToolbarTimeout();
         if (toolbarVisible) {
             this._toolbarTimeout
-                = setTimeout(this._onClick, TOOLBAR_TIMEOUT_MS);
+                = setTimeout(this._onClick, _TOOLBAR_TIMEOUT_MS);
         }
     }
 }

react/features/conference/components/Conference.web.js

 
 /**
  * For legacy reasons, inline style for display none.
- * @type {{display: string}}
+ *
+ * @private
+ * @type {{
+ *     display: string
+ * }}
  */
-const DISPLAY_NONE_STYLE = {
+const _DISPLAY_NONE_STYLE = {
     display: 'none'
 };
 
 /**
- * Implements a React Component which renders initial conference layout
+ * The conference page of the Web application.
  */
 class Conference extends Component {
 
                     <div
                         className = 'notice'
                         id = 'notice'
-                        style = { DISPLAY_NONE_STYLE }>
+                        style = { _DISPLAY_NONE_STYLE }>
                         <span
                             className = 'noticeText'
                             id = 'noticeText' />
                             <span
                                 className = 'videocontainer'
                                 id = 'localVideoContainer'>
-                                <div
-                                    className = 'videocontainer__background' />
+                                <div className = 'videocontainer__background' />
                                 <span id = 'localVideoWrapper' />
                                 <audio
                                     autoPlay = { true }
                                     id = 'localAudio'
                                     muted = { true } />
                                 <div className = 'videocontainer__toolbar' />
-                                <div
-                                    className = 'videocontainer__toptoolbar' />
+                                <div className = 'videocontainer__toptoolbar' />
                                 <div
                                     className
                                         = 'videocontainer__hoverOverlay' />

react/features/feedback/components/FeedbackButton.web.js

-/* global config */
+/* @flow */
+
 import React, { Component } from 'react';
 
+declare var config: Object;
+
 /**
- * A Web Component which renders feedback button.
+ * Implements a Web/React Component which renders a feedback button.
  */
 export class FeedbackButton extends Component {
+    state = {
+        callStatsID: String
+    };
+
+    /**
+     * Initializes a new FeedbackButton instance.
+     *
+     * @param {Object} props - The read-only properties with which the new
+     * instance is to be initialized.
+     */
+    constructor(props: Object) {
+        super(props);
+
+        this.state = {
+            callStatsID: config.callStatsID
+        };
+    }
 
     /**
      * Implements React's {@link Component#render()}.
      * @returns {ReactElement}
      */
     render() {
-
-        // if there is no callstats configured skip rendering
-        if (!config.callStatsID) {
+        // If callstats.io-support is not configured, skip rendering.
+        if (!this.state.callStatsID) {
             return null;
         }