Fix eslint6 jsx-a11y/no-static-element-interactions

[MAILPOET-1140]

assets/js/src/listing/header.jsx

@@ -74,7 +74,11 @@ const ListingColumn = React.createClass({
 
     if (this.props.column.sortable === true) {
       label = (
-        <a onClick={this.handleSort}>
+        <a
+          onClick={this.handleSort}
+          role="button"
+          tabIndex={0}
+        >
           <span>{ this.props.column.label }</span>
           <span className="sorting-indicator" />
         </a>
@@ -84,6 +88,7 @@ const ListingColumn = React.createClass({
     }
     return (
       <th
+        role="columnheader"
         className={classes}
         id={this.props.column.name}
         scope="col"

assets/js/src/listing/listing.jsx

@@ -90,6 +90,8 @@ const ListingItem = React.createClass({
             <span
               onClick={this.props.onRefreshItems}
               key={`action-${index}`} className={action.name}
+              role="button"
+              tabIndex={index}
             >
               {(!isFirst) ? ' | ' : ''}
               { action.link(this.props.item) }

assets/js/src/newsletters/templates/template_box.jsx

@@ -127,12 +127,16 @@ class TemplateBox extends React.Component {
           <a
             className="button button-secondary"
             onClick={this.onPreview}
+            role="button"
+            tabIndex={0}
           >{MailPoet.I18n.t('preview')}</a>
             &nbsp;
           <a
             className="button button-primary"
             data-automation-id={`select_template_${index}`}
             onClick={this.onSelect}
+            role="button"
+            tabIndex={0}
           > {MailPoet.I18n.t('select')} </a>
         </div>
         { readonly === '1' ? false : deleteLink }

assets/js/src/newsletters/types.jsx

@@ -81,7 +81,13 @@ define(
             description: MailPoet.I18n.t('regularNewsletterTypeDescription'),
             action: function () {
               return (
-                <a className="button button-primary" data-automation-id="create_standard" onClick={this.createNewsletter.bind(null, 'standard')}>
+                <a
+                  className="button button-primary"
+                  data-automation-id="create_standard"
+                  onClick={this.createNewsletter.bind(null, 'standard')}
+                  role="button"
+                  tabIndex={0}
+                >
                   {MailPoet.I18n.t('create')}
                 </a>
               );
@@ -107,7 +113,13 @@ define(
             description: MailPoet.I18n.t('postNotificationNewsletterTypeDescription'),
             action: function () {
               return (
-                <a className="button button-primary" data-automation-id="create_notification" onClick={this.setupNewsletter.bind(null, 'notification')}>
+                <a
+                  className="button button-primary"
+                  data-automation-id="create_notification"
+                  onClick={this.setupNewsletter.bind(null, 'notification')}
+                  role="button"
+                  tabIndex={0}
+                >
                   {MailPoet.I18n.t('setUp')}
                 </a>
               );