* renderer_opengl.cpp: fix sanitize_mul check for disk shader cache
* Partially revert "Band-aid solution for 'Disk Shader Cache' (#5188)"
This reverts commit 2e0ce86c9e.
* Disable `disk_shader_cache` checkbox when `hw_renderer` is off
video_core: shorten GetGLSLVersionString
video_core: make GLES version and extensions consistent
video_core: move some logic to LoadShader
video_core: deduplicate fragment shader precision specifier