(portable win32) Start server without '--address' if host is default (0.0.0.0).
This opens browser with 'localhost' instead of '0.0.0.0' because windows browsers can not open 0.0.0.0!

Save server_settings (host, port) in gui_settings.json.
Merge pull request #844 from emanuelschuetze/stable/1.4.x

(portable win32) Start server without '--address' if host is default (0....