fix: [dashboard] should not show edit button when user has no edit permit (#11024)

superset-frontend/src/dashboard/components/Header.jsx

@@ -443,6 +443,7 @@ class Header extends React.PureComponent {
               tabIndex={0}
               className="action-button"
               onClick={this.toggleEditMode}
+              disabled={!userCanEdit}
             >
               <Icon name="pencil" />
             </span>