v1.1.0-rc

Project now uses goappbase as platform, giving more stability, clearer code and much less boiler-plate code.

Vendor libraries upgraded: Bootstrap 5.3.3, Vue 3.4.21, CKEditor 41.2.1.

Important changes (due to using goappbase):

• gui_port configuration option renamed to webserver_port
• gui_cookie_secret_key configuration option renamed to webserver_cookie_secret