Saving settings in multisite fails

[tyrann0us]

Unfortunately, WordPress is not very consistent when it comes to naming files on single site vs. multisite. For example, there's no wp-admin/network/options.php file. But this very options.php is hardcoded in the plugin:

satispress/views/screen-settings.php

Line 49 in 203c878

<form action="options.php" method="post">

Expectedly, saving SatisPress' settings in multisite won't work and triggers a 404.

Changing the line to this solves it but I'm not sure if it's the right approach:
<form action="<?php echo admin_url( 'options.php' ); ?>" method="post">

[bradyvercher]

I guess that shows how often SatisPress is being used with multisite!

I've usually used a custom action for saving network settings, but if using admin_url() works, let's go with that. Would you like to submit a PR? If so, please throw esc_url() in there, too.