Admin: Add a "Set up your homepage" link to the Welcome panel.

As many WordPress sites use a static homepage rather than a blog, this link gives a natural next step for new sites owners wanting to configure their site in this manner.

Props professor44, joyously, nielslange, mukesh27, melchoyce.
Fixes #45019.


Built from https://develop.svn.wordpress.org/trunk@44485


git-svn-id: http://core.svn.wordpress.org/trunk@44316 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/dashboard.php

@@ -1766,6 +1766,7 @@ function wp_welcome_panel() {
 		<?php else : ?>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-write-blog">' . __( 'Write your first blog post' ) . '</a>', admin_url( 'post-new.php' ) ); ?></li>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-add-page">' . __( 'Add an About page' ) . '</a>', admin_url( 'post-new.php?post_type=page' ) ); ?></li>
+			<li><?php printf( '<a href="%s" class="welcome-icon welcome-setup-home">' . __( 'Set up your homepage' ) . '</a>', current_user_can( 'customize' ) ? add_query_arg( 'autofocus[section]', 'static_front_page', admin_url( 'customize.php' ) ) : admin_url( 'options-reading.php' ) ); ?></li>
 		<?php endif; ?>
 			<li><?php printf( '<a href="%s" class="welcome-icon welcome-view-site">' . __( 'View your site' ) . '</a>', home_url( '/' ) ); ?></li>
 		</ul>