Fix "cancel follow request" button having unreadable text in web UI (mastodon#11521)

Fix mastodon#11478

Author: Gargron

app/javascript/mastodon/components/button.js

@@ -12,6 +12,7 @@ export default class Button extends React.PureComponent {
     secondary: PropTypes.bool,
     size: PropTypes.number,
     className: PropTypes.string,
+    title: PropTypes.string,
     style: PropTypes.object,
     children: PropTypes.node,
   };
@@ -54,6 +55,7 @@ export default class Button extends React.PureComponent {
         onClick={this.handleClick}
         ref={this.setRef}
         style={style}
+        title={this.props.title}
       >
         {this.props.text || this.props.children}
       </button>

app/javascript/mastodon/features/account/components/header.js

@@ -15,6 +15,7 @@ import DropdownMenuContainer from 'mastodon/containers/dropdown_menu_container';
 const messages = defineMessages({
   unfollow: { id: 'account.unfollow', defaultMessage: 'Unfollow' },
   follow: { id: 'account.follow', defaultMessage: 'Follow' },
+  cancel_follow_request: { id: 'account.cancel_follow_request', defaultMessage: 'Cancel follow request' },
   requested: { id: 'account.requested', defaultMessage: 'Awaiting approval. Click to cancel follow request' },
   unblock: { id: 'account.unblock', defaultMessage: 'Unblock @{name}' },
   edit_profile: { id: 'account.edit_profile', defaultMessage: 'Edit profile' },
@@ -148,7 +149,7 @@ class Header extends ImmutablePureComponent {
       if (!account.get('relationship')) { // Wait until the relationship is loaded
         actionBtn = '';
       } else if (account.getIn(['relationship', 'requested'])) {
-        actionBtn = <Button className='logo-button' text={intl.formatMessage(messages.requested)} onClick={this.props.onFollow} />;
+        actionBtn = <Button className='logo-button' text={intl.formatMessage(messages.cancel_follow_request)} title={intl.formatMessage(messages.requested)} onClick={this.props.onFollow} />;
       } else if (!account.getIn(['relationship', 'blocking'])) {
         actionBtn = <Button disabled={account.getIn(['relationship', 'blocked_by'])} className={classNames('logo-button', { 'button--destructive': account.getIn(['relationship', 'following']) })} text={intl.formatMessage(account.getIn(['relationship', 'following']) ? messages.unfollow : messages.follow)} onClick={this.props.onFollow} />;
       } else if (account.getIn(['relationship', 'blocking'])) {