Add `single`/`double` as export features automatically

editor/export/editor_export_platform.cpp

@@ -481,6 +481,12 @@ HashSet<String> EditorExportPlatform::get_features(const Ref<EditorExportPreset>
 		result.insert("template_release");
 	}
 
+#ifdef REAL_T_IS_DOUBLE
+	result.insert("double");
+#else
+	result.insert("single");
+#endif // REAL_T_IS_DOUBLE
+
 	if (!p_preset->get_custom_features().is_empty()) {
 		Vector<String> tmp_custom_list = p_preset->get_custom_features().split(",");
 

editor/export/project_export.cpp

@@ -409,6 +409,12 @@ void ProjectExportDialog::_update_feature_list() {
 		feature_set.insert(E);
 	}
 
+#ifdef REAL_T_IS_DOUBLE
+	feature_set.insert("double");
+#else
+	feature_set.insert("single");
+#endif // REAL_T_IS_DOUBLE
+
 	custom_feature_display->clear();
 	String text;
 	bool first = true;