More displayPort_t, CANVAS as new feature, multi-display cycling

- Further touch-ups with displayPort_t handling.
- CANVAS is a FEATURE now.
- Device specific xxxCmsInit() are registered by device’s init, and
called by CMS upon entry to menu.
- Multiple display devices can be cycled by entering menu invocation
command while in menu.
- The menu invocation command is (was) changed to THR-Mid + YAW-Left +
Pitch-Full to avoid collision with MWOSD menu invocation command.
- More separation attempt.

src/main/io/osd.h

@@ -66,7 +66,10 @@ typedef struct {
 void updateOsd(uint32_t currentTime);
 void osdInit(void);
 void resetOsdConfig(osd_profile_t *osdProfile);
-displayPort_t *osdCmsInit(void);
+
+#ifdef CMS
+void osdCmsInit(displayPort_t *);
+#endif
 
 // Character coordinate and attributes