Disable removal of items if the user doesn't have permission

src/components/views/room_settings/AliasSettings.js

@@ -240,6 +240,7 @@ export default class AliasSettings extends React.Component {
                     items={this.state.domainToAliases[localDomain] || []}
                     newItem={this.state.newAlias}
                     onNewItemChanged={this.onNewAliasChanged}
+                    canRemove={this.props.canSetAliases}
                     canEdit={this.props.canSetAliases}
                     onItemAdded={this.onLocalAliasAdded}
                     onItemRemoved={this.onLocalAliasDeleted}

src/components/views/room_settings/RelatedGroupSettings.js

@@ -107,6 +107,7 @@ export default class RelatedGroupSettings extends React.Component {
                 items={this.state.newGroupsList}
                 className={"mx_RelatedGroupSettings"}
                 newItem={this.state.newGroupId}
+                canRemove={this.props.canSetRelatedGroups}
                 canEdit={this.props.canSetRelatedGroups}
                 onNewItemChanged={this.onNewGroupChanged}
                 onItemAdded={this.onGroupAdded}