--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/Ember/Utils.h

@@ -182,7 +182,7 @@ static bool ReadFile(const char* filename, string& buf, bool nullTerminate = tru
 	{
 		fopen_s(&f, filename, "rb");//Open in binary mode.
 
-		if (f != nullptr)
+		if (f)
 		{
 			struct _stat statBuf;
 
@@ -225,7 +225,7 @@ static bool ReadFile(const char* filename, string& buf, bool nullTerminate = tru
 		b = false;
 	}
 
-	if (f != nullptr)
+	if (f)
 		fclose(f);
 
 	return b;
@@ -279,7 +279,7 @@ static void ClearVec(vector<T*>& vec, bool arrayDelete = false)
 {
 	for (size_t i = 0; i < vec.size(); i++)
 	{
-		if (vec[i] != nullptr)
+		if (vec[i])
 		{
 			if (arrayDelete)
 				delete [] vec[i];