DB48X: HP48-like RPL implementation for DM42

[c3d]

There were a couple of embarrassing bugs in v0.7.0, nothing really harmful, but enough to justify a 0.7.1 the next day.

The first big problem was that inserting variable names from the VariablesMenu in programs was broken. Similarly for units from units menus and constants from constants menus. This was the primary driver for a new release.

Also an embarrassing off-by-one error for day-of-week in dates due to different conventions for DMCP and Unix.

https://github.com/c3d/DB48X-on-DM42/rel...tag/v0.7.1

decimal: Apply MinimumSignificantDigits to Sig modes
tests: Fix missing ] at end of vector
ui: Insert commands for unit conversions, constants and variables
tests: Adjust help screen snapshot for authors
menus: Do not clip text for hierarchical menus
constants: Do not use units that don't parse correctly
dmcp: Day of week convention adjustment
help: Fix YouTube video preview