Propagate read only in Angular Material master detail

When an Angular Material master detail control is set to read only, it
will now also render its detail as read only with the same mechanism
used in the other Angular Material renderers.

Closes #1479

packages/angular-material/src/other/master-detail/master.ts

@@ -41,6 +41,7 @@ import {
   mapStateToArrayControlProps,
   RankedTester,
   rankWith,
+  setReadonly,
   StatePropsOfArrayControl,
   uiTypeIs
 } from '@jsonforms/core';
@@ -183,6 +184,10 @@ export class MasterListComponent extends JsonFormsArrayControl {
         props.rootSchema
       );
 
+    if (!this.isEnabled()) {
+      setReadonly(detailUISchema);
+    }
+
     const masterItems = (data || []).map((d: any, index: number) => {
       const labelRefInstancePath = controlElement.options?.labelRef && removeSchemaKeywords(
         controlElement.options.labelRef