Improve reliability of detecting Windows in the Makefile (!978) · Merge requests · RPN Calculators / WP43 · GitLab

Benjamin Titmus requested to merge 523-Named-Variables-UI-Merge into master Mar 12, 2021

Removed the explicit setting of detected_OS in GitLab CI as this was a mistake
Used the mechanism specified on the Stack Overflow answer: https://stackoverflow.com/questions/714100/os-detecting-makefile