Print a warning and skip parsing classes that try to inherit from themselves (instead of going into an infinite loop)

Add texture format to the Texture class so that render target textures do not have to be in the bgra8 format

This extra block helps ZDBSP building better nodes for maps that are too big and starts generating visual issues with regular nodebuilding.

Fixed: there was no highlight shader for internal sprites for ZDoom effects disabled;  Fixed: highlighting of transparent walls/floors was broken

Load previews when they are accessed

Dispose the bitmap as soon as it has been uploaded to a texture. Use a 1 bit alphatest bitmap for those that have transparency in them.

Fixed an issue where grid background images were drawn upside down and moved in the wrong direction on the Y axis when scrolling

Disable devil
Support mac build (which is useless as mono doesn't support winforms on modern macOS)

Fixed a problem where negative Y scales of sidedefs would result in a wrong offset when auto-aligning