mckaygerhard
be06a8ad6b
* address [#7563](https://github.com/minetest/minetest/issues/7563) * Disable shaders GUI on unsupported drivers [#2060](https://github.com/minetest/minetest/issues/2060) * Disable shaders if unavailable * also backported "shaders disabled by default" continue of commit 21b1462b58