CORE-15479 Regression Test: "Wine Mono 4.5.6 from rapps against the Test app from CORE-9612, does the gradient below menu bar draw correctly?"

0.4.11-RC-22-g2522ec1     affected, gradient broken
0.4.8-RC-25-g11bf8fa      affected, gradient broken
bootcd-76032-dbg.iso      affected, gradient broken
bootcd-75969-dbg.iso      affected, gradient broken
bootcd-75902-dbg.iso      affected, gradient broken
bootcd-75884-dbg.iso      affected, gradient broken
bootcd-75874-dbg.iso      affected, gradient broken
bootcd-75872-dbg.iso      affected, gradient broken <- guilty c6f32e4a5f8b998a1efb7cd4698cf8247bea1adc "[GDIPLUS] Sync with Wine Staging 2.16. CORE-13762" by akhaldi 2017-09-17
bootcd-75871-dbg.iso      ok, gradient fine
bootcd-75869-dbg.iso      ok, gradient fine
bootcd-75865-dbg.iso      ok, gradient fine
bootcd-75829-dbg.iso      ok, gradient fine
bootcd-75677-dbg.iso      ok, gradient fine
bootcd-75407-dbg.iso      ok, gradient fine
bootcd-72619-dbg.iso      ok, gradient fine