Kicad, Windows specific: disable a overzealous wxWidgets assert when reading a file.
When reading (and writing) a file, we must switch the current locale to "C" for LC_NUMERIC.
Unfortunately, on Windows, a wxWidgets assert was shown when reading some items (bitmaps images).
This wxWidgets assert (related to decimal separator) is overzealous and is now hidden only when reading/writing files.
CanonicalizeName only adds the lib prefix and .so suffix, so loading
libngspice.so fails until the development package is installed.
MAC/Windows code paths lookup soversion 0 of ngspice as well, as this
is the only compatible version.
It is possible for an async thread to simply be deferred if not
specifically set to async. In which case, until the return value is
requested, the loop may simply wait.
Threading: Moving connectivity search to std::async
By decoupling from std::thread, we can avoid the wait/sleep cycle in
checking the std::atomic completion variable. The std::future variables
are immediately returning without the additional atomic check cycle.
Fixes a crash when typing fast in the place footprint filter box.
Also adds a bunch more checking to GAL locking, including making
sure the same person unlocks as locked, and preventing piece-meal
calls (the RAII objects must be used).
Eeschema: fix a draw issue when aborting a move symbol field or a sheet pin.
The initial drawings were not updated, making the moved item invisible on screen.
