Feature Request: Offer option to hide RaspiWiFi setup instructions from splash screen

[gitname]

Use case: A karaoke facilitator may want to use RaspiWiFi to create a local WiFi network -- isolated from the Internet -- for his or her guests to connect their mobile phones to in order to choose songs from his or her local library; but may not want his or her Raspberry Pi to be connected to the Internet or to be used to download songs from YouTube.

Currently, when RaspiWiFi is being used in that way (i.e. in its "setup" mode), the pikaraoke splash screen shows instructions that anyone could follow in order to "finish the job" of connecting the Raspberry Pi to an existing WiFi network that may have Internet access.

The feature I am requesting is the addition of an option that can be used to hide those instructions from the splash screen. I think that would decrease the chances that a guest connects the Raspberry Pi to an existing WiFi network (which I think would also trigger an immediate reboot of the device).

I have implemented this as a CLI option (i.e. --hide-raspiwifi-instructions) in my fork of the repo and plan to open a PR shortly.