nowide
Description
This patch adds a new terminal mode, /NOWIDE/. If it's enabled, wide characters
will be replaced with a faint question mark. This mode can be enabled or
disabled by default with the renderwide variable in config.def.h, and can be
toggled with a keybind (Ctrl+Shift+W by default).
This mode is specially useful if your font doesn't support wide characters, since rendering them usually makes the terminal really, really slow, specially when scrolling.
This patch is intended for ST 0.8.2, but it should be easy to port it to newer versions.