Remove duplicate waypoints messages in the OSD/Hud

[OlivierC-FR]

... since it's now displayed in the system message ("TO WP 1/4")

[breadoven]

There is the possibility that you have an OSD screen with HUD but no system messages field in which case you might want to keep the HUD WP countdown. Perhaps a separate "To WP" OSD field is required, put it where you like.

Also, the messages are slightly different, the HUD one actually shows WPs completed rather than the one you're heading to. Not sure if this was intentional or a mistake, perhaps a mistake given the code is dealing with next WPs.

[OlivierC-FR]

There is the possibility that you have an OSD screen with HUD but no system messages field in which case you might want to keep the HUD WP countdown. Perhaps a separate "To WP" OSD field is required, put it where you like.

Also, the messages are slightly different, the HUD one actually shows WPs completed rather than the one you're heading to. Not sure if this was intentional or a mistake, perhaps a mistake given the code is dealing with next WPs.

Interesting, I didn't think of the case where the user would disable the system message, but that's highly uncommon IMHO.
The fact one shows WP and the other WP+1, was not intentional nor planned, it's just I made the display of the WP in the hud first, and then someone else added the WPs in the message system line later. It makes more sense to have it in the message system I think, that's less clutter on the screen. Or it could be an option to be displayed on/off in the hud. But there's already so many options in INAV, unsure one more is a good idea :[