Gui: Save defaults layout after first launch

src/Gui/OverlayWidgets.cpp

@@ -889,6 +889,9 @@ void OverlayTabWidget::restore(ParameterGrp::handle handle)
 
     getSplitter()->setSizes(sizes);
     hGrp = handle;
+
+    // if updated save the state into settings to preserve layout in case of defaults change
+    saveTabs();
 }
 
 void OverlayTabWidget::saveTabs()

src/Gui/TaskView/TaskView.cpp

@@ -716,6 +716,10 @@ void TaskView::removeDialog()
 }
 void TaskView::setShowTaskWatcher(bool show)
 {
+    if (showTaskWatcher == show) {
+        return;
+    }
+
     showTaskWatcher = show;
     if (show) {
         addTaskWatcher();