feat: use any source for expo/weight/offset (#5220)

Co-authored-by: philmoz <phil.a.mitchell@gmail.com>
Co-authored-by: 3djc <3djc@gh.com>
Co-authored-by: elecpower <elecpower@users.noreply.github.com>

companion/src/modeledit/curves.cpp

@@ -55,7 +55,7 @@ CurvesPanel::CurvesPanel(QWidget * parent, ModelData & model, GeneralSettings &
     tableLayout->addWidget(i, col++, label);
 
     image[i] = new CurveImageWidget(this);
-    image[i]->set(&model, firmware, sharedItemModels, i, colors[i], 3);
+    image[i]->set(&model, firmware, sharedItemModels, i + 1, colors[i], 3);
     image[i]->setGrid(Qt::gray, 2);
     image[i]->setProperty("index", i);
     image[i]->setFixedSize(QSize(100, 100));