v21

Fixes:
-PBR: All properties and textures are now properly included as constants
-Kaj Shader Editor: Foldout properties no longer get recorded in the animation clip editor
-Shader Optimizer: No longer writes files twice
-Shader Optimizer: No longer skips range properties
-Shader Optimizer: Separately checks _Texture_TexelSize and _Texture_ST properties
-Shader Optimizer: Render queue and render type override tags are now kept when locking and unlocking shaders

New features:
-PBR: All usable properties can now be marked as animated and will be skipped by the optimizer (Optimizer Settings/Animated Properties section)
-Shader Editor: ToggleUILeft Drawer
-Shader Optimizer: Generated shader name now matches the generated folder name
-Shader Optimizer: Dithered LOD Crossfade can be dynamically uncommented with a material property
-Shader Optimizer: Ignore Projector and ForceNoShadowCasting override tags can be uncommented with a material property, since override tags don't work
-Shader Optimizer: Inline sampler states can replace hard coded sampler states given a texture property's filter and wrap modes. All PBR shader textures use Bilinear/Wrap sampling by default until the material is locked in.