added a way to postpone texture uploading so main thread could do it - r_postponeTextureUpload
fixed more case sensitive file names in UI, models, shaders, and sound stuff
will no longer build ctx files from rtx files
added a "Compressed textures not supported" warning
now TextInput widgets can handle Ctrl-v (paste)
fixed some show commands not working on first menu shown
each OS build now reads a platform specific default.cfg before main default.cfg