Cleaned up OpenGLCanvas code

Source/Main.cpp

Source/MainWindow.cpp

Source/Processors/AudioNode.h

Source/Processors/Editors/EventNodeEditor.cpp

Source/Processors/GenericProcessor.h

Source/Processors/Visualization/LfpDisplayCanvas.cpp

Source/Processors/Visualization/LfpDisplayCanvas.h

Source/Processors/Visualization/OpenGLCanvas.cpp

Source/Processors/Visualization/OpenGLCanvas.h

Source/UI/EditorViewport.cpp

Source/UI/EditorViewport.h

Source/UI/InfoLabel.cpp

Source/UI/InfoLabel.h

Source/UI/ProcessorList.cpp

Source/UI/ProcessorList.h