Webaccess: fixed behaviour of buttons in solo frames, fixed crash when websocket connection is not set

Added input profile: KORG nano PAD (thanks to Alessandro Grechi)
Webaccess: added code to set an autostart project (Raspberry only)
Virtual Console: multipage frames input associations are now contextual
Enforce not supported simultaneous audio
Function selection: do not show "none" entry if not necessary
NEW: Clock widget can now be used to schedule a function startup
Updated KORG nanoPAD profile and added a note in the documentation
4.6.1 going to be released today
Fixed wrong name in RGB Algorithm test
Fix function selection. Under certain conditions signals were blocked, thus making OK disabled forever.

See https://sourceforge.net/p/qlcplus/discussion/general/thread/ddd4bf9f