settings panel moved to xml (WIP)

src/graphics/ui/elements/controls.cpp

@@ -912,7 +912,8 @@ void TrackBar::mouseMove(GUI*, int x, int y) {
     value += min;
     value = (value > max) ? max : value;
     value = (value < min) ? min : value;
-    value = (int)(value / step) * step;
+    value = (int64_t)round(value / step) * step;
+
     if (consumer) {
         consumer(value);
     }