--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/Fractorium/FractoriumXformsVariations.cpp

@@ -239,7 +239,6 @@ void FractoriumEmberController<T>::VariationSpinBoxValueChanged(double d)//Would
 				if (xformVar)
 					xform->DeleteVariationById(var->VariationId());
 
-				//widgetItem->setBackgroundColor(0, Qt::darkGray);//Ensure background is always white if weight goes to zero.
 				widgetItem->setBackgroundColor(0, QColor(255, 255, 255));//Ensure background is always white if weight goes to zero.
 			}
 			else
@@ -256,7 +255,6 @@ void FractoriumEmberController<T>::VariationSpinBoxValueChanged(double d)//Would
 
 					newVar->m_Weight = d;
 					xform->AddVariation(newVar);
-					//widgetItem->setBackgroundColor(0, Qt::darkGray);//Set background to gray when a variation has non-zero weight in this xform.
 					widgetItem->setBackgroundColor(0, QColor(200, 200, 200));//Set background to gray when a variation has non-zero weight in this xform.
 
 					//If they've added a new parametric variation, then grab the values currently in the spinners