Allow changing roughness height statistics in GUI

Now roughness has its own collapsible form which can be further extended.

Height statistics is a separate option there.

Resolves #1016 (closed)

Fit/Adapter/MinimizerAdapter.cpp

@@ -124,11 +124,12 @@ void MinimizerAdapter::propagateResults(mumufit::Parameters& parameters)
     parameters.setErrors(parErrorsAtMinimum());
     // sets correlation matrix
     if (providesError()) {
-	auto lambda = [&](size_t i, size_t j) -> double
-	    { return rootMinimizer()->Correlation(static_cast<unsigned int>(i),
-						  static_cast<unsigned int>(j)); };
-	double2d_t matrix = FieldUtil::make<double>(fitRank(), fitRank(), lambda);
-	parameters.setCorrelationMatrix(matrix);
+        auto lambda = [&](size_t i, size_t j) -> double {
+            return rootMinimizer()->Correlation(static_cast<unsigned int>(i),
+                                                static_cast<unsigned int>(j));
+        };
+        double2d_t matrix = FieldUtil::make<double>(fitRank(), fitRank(), lambda);
+        parameters.setCorrelationMatrix(matrix);
     }
 }