DB48X: HP48-like RPL implementation for DM42

[c3d]

A new minor release 0.7.9 is out.

This release includes a number of bug fixes, facilitates build from scratch by third-parties, and delivers a WASM-based simulator that runs on the https://48calc.org web site.

Features

menu: Add Purge to the ClearThingsMenu
purge: Add support for lists
units: Accept units for sqrt, cbrt and xroot
wasm: Add variant for 48calc.org
wasm: Implement WASM support

Bug fixes

complex: Give Syntax error for phasor without an angle
dms/hms: Parse empty numbers in DMS entry
dms/hms: Protect display against bad input
editor: Make sure we reposition after shift-up and shift-down
parser: Parse degrees as an angle unit in phasors
simulator: Avoid high CPU usage when a timer is active
simulator: Use the correct color for firmware text
ui: Compute the correct refresh rate even when nothing is displayed
ui: Create a non-empty dirty rectangle when clearing annunciators
ui: Do not refresh beyond LCD size
ui: Ensure we redraw the shift region to clear busy
units: Disable simplification during unit definition evaluation

Improvements

build: Fix the clean build
object: Remove defaults for as_uint32 and similar
parser: Cache parser::length when possible
parser: Merge the parser::end and parser::length fields
parser: Optimize integer parsing early exit
simulator: Avoid Cancel in file save dialog
simulator: Use https as a protocol for git submodules
tests: Add support for degrees sign
tests: Add test for polar angle conversion.
units: Add factoring variable to limit simplifications
wasm: Add link to deployed WASM simulator in the README
wasm: Add script to add COOP / COEP headers
wasm: Run the RPL thread in a separate thread