Add force loading order login for multisite

[pcfreak30]

You have Pantheon_Sessions::force_first_load which handles normal wp, but it should also run the same process on the network option active_sitewide_plugins

[danielbachhuber]

Thanks for the suggestion, @pcfreak30. We might also want to do #132 too.

[pcfreak30]

Rough code change I just had to make on a site, though the timestamp doesn't sem to get preserved

                $path    = plugin_basename(__FILE__);
                $plugins = get_site_option( 'active_sitewide_plugins' );
                if ( $plugins ) {
                        $plugins = array_flip($plugins);
                        $key = array_search( $path, $plugins, true );
                        array_splice( $plugins, $key, 1 );
                        array_unshift( $plugins, $path );
                        $plugins = array_flip($plugins);
                        update_site_option( 'active_sitewide_plugins', $plugins );
                }

                return;
        }

active_sitewide_plugins seems to use a basename => timestamp format.

[pcfreak30]

It also seems the timestamps are somehow important for the plugins to load, so the above code is partially flawed but a starting point.