Button can be enable on readonly record and group

issue5010
review27391002

src/common.js

@@ -744,9 +744,6 @@
             var states;
             if (record) {
                 states = record.expr_eval(this.attributes.states || {});
-                if (record.group.get_readonly() || record.readonly()) {
-                    states.readonly = true;
-                }
             } else {
                 states = {};
             }