Rewrite code for unfolding and make it automatic on scene load, which works better.

editor/editor_folding.cpp

@@ -2,6 +2,7 @@
 
 #include "core/os/file_access.h"
 #include "editor_settings.h"
+#include "editor_inspector.h"
 
 PoolVector<String> EditorFolding::_get_unfolds(const Object *p_object) {
 
@@ -171,5 +172,89 @@ bool EditorFolding::has_folding_data(const String &p_path) {
 	return FileAccess::exists(file);
 }
 
+
+void EditorFolding::_do_object_unfolds(Object *p_object, Set<RES> &resources) {
+
+	List<PropertyInfo> plist;
+	p_object->get_property_list(&plist);
+	String group_base;
+	String group;
+
+	Set<String> unfold_group;
+
+	for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
+
+		if (E->get().usage & PROPERTY_USAGE_CATEGORY) {
+			group="";
+			group_base="";
+		}
+		if (E->get().usage & PROPERTY_USAGE_GROUP) {
+			group = E->get().name;
+			group_base = E->get().hint_string;
+			if (group_base.ends_with("_")) {
+				group_base=group_base.substr(0,group_base.length()-1);
+			}
+		}
+
+		//can unfold
+		if (E->get().usage & PROPERTY_USAGE_EDITOR) {
+
+
+			if (group != "") { //group
+				if (group_base==String() || E->get().name.begins_with(group_base)) {
+					bool can_revert = EditorPropertyRevert::can_property_revert(p_object,E->get().name);
+					if (can_revert)	{
+						unfold_group.insert(group);
+					}
+				}
+			} else { //path
+				int last = E->get().name.find_last("/");
+				if (last!=-1) {
+					bool can_revert = EditorPropertyRevert::can_property_revert(p_object,E->get().name);
+					if (can_revert) {
+						unfold_group.insert(E->get().name.substr(0,last));
+					}
+				}
+			}
+		}
+
+		if (E->get().type == Variant::OBJECT) {
+			RES res = p_object->get(E->get().name);
+			if (res.is_valid() && !resources.has(res) && res->get_path() != String() && !res->get_path().is_resource_file()) {
+
+				resources.insert(res);
+				_do_object_unfolds(res.ptr(),resources);
+			}
+		}
+	}
+
+	for (Set<String>::Element *E=unfold_group.front();E;E=E->next()) {
+	     p_object->editor_set_section_unfold(E->get(),true);
+	}
+}
+
+void EditorFolding::_do_node_unfolds(Node *p_root, Node *p_node, Set<RES> &resources) {
+	if (p_root != p_node) {
+		if (!p_node->get_owner()) {
+			return; //not owned, bye
+		}
+		if (p_node->get_owner() != p_root && !p_root->is_editable_instance(p_node)) {
+			return;
+		}
+	}
+
+	_do_object_unfolds(p_node,resources);
+
+	for (int i = 0; i < p_node->get_child_count(); i++) {
+		_do_node_unfolds(p_root, p_node->get_child(i), resources);
+	}
+}
+
+void EditorFolding::unfold_scene(Node *p_scene) {
+
+	Set<RES> resources;
+	_do_node_unfolds(p_scene,p_scene,resources);
+}
+
 EditorFolding::EditorFolding() {
 }