--User changes

-Add a new dialog for editing QSS stylesheets. Allow for saving, reloading and setting styles as default.
  --Include a dark style with the installation called dark.qss.
  --Also add support for themes such as Fusion.
  --Resize some controls to better fit with the new style.
 -Add an option to specify the number of random embers generated on startup. 1 is the minimum and the default.

--Bug fixes
 -Properly enable/disable thread priority label in final render dialog in response to enable/disable of the OpenCL checkbox.
 -Remove all inline stylesheets.
 -Show xaos spinners with 6 decimal places.

--Code changes
 -Remove redundant comparisons to nullptr, use ! instead;
 -Give some controls valid names instead of the auto generated ones.
 -DoubleSpinBoxTableItemDelegate.h: Add virtual keyword to overridden functions.

Source/EmberCL/RendererCL.cpp

@@ -759,7 +759,7 @@ eRenderStatus RendererCL<T, bucketT>::AccumulatorToFinalImage(byte* pixels, size
 {
 	eRenderStatus status = RunFinalAccum();
 
-	if (status == RENDER_OK && pixels != nullptr && !m_Devices.empty() && !m_Devices[0]->m_Wrapper.Shared())
+	if (status == RENDER_OK && pixels && !m_Devices.empty() && !m_Devices[0]->m_Wrapper.Shared())
 	{
 		pixels += finalOffset;