Security personalizer rewritten (#794)

* Removed ability to lock data section
* Introduced "guided mode" to simplify process
* Refactored the sketch to be less monolithic
* Print details and instructions in tables
* Use device unique ID as serial when
* Calculate and store personalization checksum
* Print serial in a copy+paste friendly manner (fixes #804)
* Clarify meaning of UART confirmation (fixes #805)

core/MyHw.h

@@ -59,6 +59,11 @@ uint8_t hwReadConfig(int adr);
 
 typedef uint8_t unique_id_t[16];
 
+/**
+ * Sleep for a defined time, using minimum power.
+ * @param ms         Time to sleep, in [ms].
+ * @return -1.
+ */
 int8_t hwSleep(unsigned long ms);
 
 /**