Change GLWidget->setTexture() to GLWidget->setMapTexture (because there will be a GLWidget->setDisplayTexture() shortly)
Get GLWidget->setMapTexture() texturesize from opengl
Bind mapTexture in PaintGL
Implemented New->Unit map... by drawing gradient into GeneratedImage Fbo and reading its texture into a cv::Mat
Removed checkbox to create a "cropped" unitmap for now