Add unit test for Annotation::renderToImage
This test checks the expected ratio of pixels in known color inside the rendered image, with minor tolerance, in order to improve test maintainability. Note: The test covers ArthurOutputDev, which requires a QGuiApplication due to internal usage of QRawFont. Therefore we have a dependency on running X during test execution.
render-single-annotation in 11 minutes and 40 seconds (queued for 2 seconds)4 jobs for