Fix uniform names on struct arrays

[ThomasMiz]

The name of the uniforms isn't properly cut.

This is because of the code at the constructor of ShaderUniform:

TrippyGL/TrippyGL/ShaderUniform.cs

Lines 49 to 60 in 2ef708c

	internal ShaderUniform(ShaderProgram owner, int uniformLoc, string name, int size, UniformType type)
	{
	OwnerProgram = owner;
	UniformLocation = uniformLoc;
	Size = size;
	UniformType = type;
	// The name might come as array name for array uniforms.
	// We need to turn the name "arrayUniform[0]" into just "arrayUniform"
	int nameIndexOfThing = name.LastIndexOf('[');
	Name = nameIndexOfThing > 0 ? name.Substring(0, nameIndexOfThing) : name;

From the relevant discord conversation: