Fix handling of PROPERTY_USAGE_SUBGROUP in DocData and editor

Subgroups were added in #37678 but not properly handled everywhere
where PROPERTY_USAGE_GROUP is.

core/global_constants.cpp

@@ -568,6 +568,7 @@ void register_global_constants() {
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_INTERNATIONALIZED);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_GROUP);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_CATEGORY);
+	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_SUBGROUP);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_NO_INSTANCE_STATE);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_RESTART_IF_CHANGED);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_USAGE_SCRIPT_VARIABLE);

doc/classes/@GlobalScope.xml

@@ -1420,6 +1420,9 @@
 		<constant name="PROPERTY_USAGE_CATEGORY" value="256" enum="PropertyUsageFlags">
 			Used to categorize properties together in the editor.
 		</constant>
+		<constant name="PROPERTY_USAGE_SUBGROUP" value="512" enum="PropertyUsageFlags">
+			Used to group properties together in the editor in a subgroup (under a group).
+		</constant>
 		<constant name="PROPERTY_USAGE_NO_INSTANCE_STATE" value="2048" enum="PropertyUsageFlags">
 			The property does not save its state in [PackedScene].
 		</constant>

editor/doc_data.cpp

@@ -277,7 +277,7 @@ void DocData::generate(bool p_basic_types) {
 				EO = EO->next();
 			}
 
-			if (E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_INTERNAL)
+			if (E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_SUBGROUP || E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_INTERNAL)
 				continue;
 
 			PropertyDoc prop;

editor/plugins/script_text_editor.cpp

@@ -172,7 +172,7 @@ void ScriptTextEditor::_update_member_keywords() {
 
 	for (List<PropertyInfo>::Element *E = plist.front(); E; E = E->next()) {
 		String name = E->get().name;
-		if (E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_GROUP)
+		if (E->get().usage & PROPERTY_USAGE_CATEGORY || E->get().usage & PROPERTY_USAGE_GROUP || E->get().usage & PROPERTY_USAGE_SUBGROUP)
 			continue;
 		if (name.find("/") != -1)
 			continue;

modules/gdnative/include/nativescript/godot_nativescript.h

@@ -95,6 +95,7 @@ typedef enum {
 	GODOT_PROPERTY_USAGE_INTERNATIONALIZED = 64, //hint for internationalized strings
 	GODOT_PROPERTY_USAGE_GROUP = 128, //used for grouping props in the editor
 	GODOT_PROPERTY_USAGE_CATEGORY = 256,
+	GODOT_PROPERTY_USAGE_SUBGROUP = 512,
 	GODOT_PROPERTY_USAGE_NO_INSTANCE_STATE = 2048,
 	GODOT_PROPERTY_USAGE_RESTART_IF_CHANGED = 4096,
 	GODOT_PROPERTY_USAGE_SCRIPT_VARIABLE = 8192,

modules/gdscript/gdscript_editor.cpp

@@ -2057,7 +2057,7 @@ static void _find_identifiers_in_base(const GDScriptCompletionContext &p_context
 						List<PropertyInfo> pinfo;
 						ClassDB::get_property_list(type, &pinfo);
 						for (List<PropertyInfo>::Element *E = pinfo.front(); E; E = E->next()) {
-							if (E->get().usage & (PROPERTY_USAGE_GROUP | PROPERTY_USAGE_CATEGORY)) {
+							if (E->get().usage & (PROPERTY_USAGE_GROUP | PROPERTY_USAGE_SUBGROUP | PROPERTY_USAGE_CATEGORY)) {
 								continue;
 							}
 							if (E->get().name.find("/") != -1) {

modules/gdscript/gdscript_parser.cpp

@@ -7364,7 +7364,7 @@ bool GDScriptParser::_get_member_type(const DataType &p_base_type, const StringN
 		}
 	}
 
-#define IS_USAGE_MEMBER(m_usage) (!(m_usage & (PROPERTY_USAGE_GROUP | PROPERTY_USAGE_CATEGORY)))
+#define IS_USAGE_MEMBER(m_usage) (!(m_usage & (PROPERTY_USAGE_GROUP | PROPERTY_USAGE_SUBGROUP | PROPERTY_USAGE_CATEGORY)))
 
 	// Check other script types
 	while (scr.is_valid()) {

modules/mono/editor/bindings_generator.cpp

@@ -2383,7 +2383,7 @@ bool BindingsGenerator::_populate_object_type_interfaces() {
 		for (const List<PropertyInfo>::Element *E = property_list.front(); E; E = E->next()) {
 			const PropertyInfo &property = E->get();
 
-			if (property.usage & PROPERTY_USAGE_GROUP || property.usage & PROPERTY_USAGE_CATEGORY)
+			if (property.usage & PROPERTY_USAGE_GROUP || property.usage & PROPERTY_USAGE_SUBGROUP || property.usage & PROPERTY_USAGE_CATEGORY)
 				continue;
 
 			PropertyInterface iprop;