Maul Window 0.10.0

Test readers for text input and the on-screen keyboard, and Win32 monitors' physical size and exact refresh rate.

Added

• The test backend's mwinTestGetVirtualKeyboard and mwinTestGetTextInput tell what a window last had carried out of its on-screen keyboard and text input requests: whether the keyboard shows and for what purpose, whether the window accepts text and the caret it gave (mwin-0038).
• Win32 monitors report their physical size, from the EDID's preferred timing or its base block (a timing in centimeters, which some monitors give, yields to the base block), and their refresh rate exactly (59.94 Hz, not 59), from DisplayConfig's rational rate.

Fixed

• Under Visual Studio's ClangCL toolset every target is compiled as C23: a target made after another fetched project was compiled below it, the generator mapping its C standard to stdclatest.