Fix move tool with Auto Select Layer isn't working (fix #4812)

Prior to this fix, automatic layer selection for the Move Tool
did not work when the "Compose Groups Separately" option was active.

Related PRs: #5438, #5439

src/app/color_picker.cpp

@@ -104,7 +104,7 @@ void ColorPicker::pickColor(const Site& site,
   switch (mode) {
     // Pick from the composed image
     case FromComposition: {
-      doc::RenderPlan plan(pref.experimental.composeGroups());
+      doc::RenderPlan plan;
       plan.addLayer(sprite->root(), site.frame());
 
       doc::CelList cels;