Patch-Magento-Ui_fix-reset-disabled-attributes.patch

--- view/base/web/js/form/element/abstract.js	2019-01-29 11:43:14.326668023 +0000
+++ view/base/web/js/form/element/abstract_1.js	2019-01-29 11:43:07.262857895 +0000
@@ -451,7 +451,7 @@
         toggleUseDefault: function (state) {
             this.disabled(state);
 
-            if (this.source) {
+            if (this.source && this.hasService()) {
                 this.source.set('data.use_default.' + this.index, Number(state));
             }
         },