Fix an incorrect exposed property type in Tree

(cherry picked from commit f1bc5c976a19abed00c8193d6e9b5f4ba2e689c8)

scene/gui/tree.cpp

@@ -3868,7 +3868,7 @@ void Tree::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_allow_reselect"), &Tree::get_allow_reselect);
 
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "columns"), "set_columns", "get_columns");
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "column_titles_visible"), "set_column_titles_visible", "are_column_titles_visible");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "column_titles_visible"), "set_column_titles_visible", "are_column_titles_visible");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_reselect"), "set_allow_reselect", "get_allow_reselect");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_rmb_select"), "set_allow_rmb_select", "get_allow_rmb_select");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "hide_folding"), "set_hide_folding", "is_folding_hidden");