The extracted inbox renderer was missing HomeScreen's pairing PIN visibility
state. Provide it and check that it agrees with the complete PIN on screen.
Reuse the text drawing result instead of measuring pairing values twice, and
keep the bottom pairing layout separate from the large home renderer. This
saves 32 bytes in the RAK4631 Full Companion and lets its OTA image pass the
existing application limit without removing features or weakening checks.
Fixes the two failures in unit-test run 40174991783.
mikecarper
16399a019d