add ObjectBase::<visible>ForAllPresets methods

src/core/scene/globject.cpp

@@ -211,6 +211,12 @@ void ObjectBase::setVisible(bool v) {
 }
 
 
+void ObjectBase::setVisibleForAllPresets(bool v) {
+	for (auto & p: presets)
+		p.visible = v;
+}
+
+
 void ObjectBase::setReceiveShadows(bool on) {
 	currentPreset().receive_shadow = on;
 	setObjectsChanged();

src/core/scene/globject.h

@@ -82,6 +82,10 @@ public:
 	void setHidden(bool v) { setVisible(!v); }
 	void show() { setVisible(true); }
 	void hide() { setVisible(false); }
+	void setVisibleForAllPresets(bool v);
+	void setHiddenForAllPresets(bool v) { setVisibleForAllPresets(!v); }
+	void showForAllPresets() { setVisibleForAllPresets(true); }
+	void hideForAllPresets() { setVisibleForAllPresets(false); }
 
 	bool isReceiveShadows() const { return currentPreset().receive_shadow; }
 	bool isCastShadows() const { return currentPreset().cast_shadow; }