If the user has left the setup mode and starts a uhttpd instance to
serve the config mode during normal runtime of the gluon node, this
change is helpful. Instead of the "Save" or "Save & reboot" button,
now a "Save & apply" button is presented. If this button is pressed,
"gluon-reload" including a "gluon-reconfigure" is invoked internally
causing the node to regenerate and reload its configuration
immediately.
Currently such an uhttpd instance is not running by default, but a
user can start such an instance manually and access it via ssh port
forwarding.
