move room publish toggle below canonical alias

also to own component to not contaminate alias settings too much
with this

src/components/views/room_settings/AliasSettings.js

@@ -25,6 +25,7 @@ import Field from "../elements/Field";
 import ErrorDialog from "../dialogs/ErrorDialog";
 import AccessibleButton from "../elements/AccessibleButton";
 import Modal from "../../../Modal";
+import RoomPublishSetting from "./RoomPublishSetting";
 
 class EditableAliasesList extends EditableItemList {
     constructor(props) {
@@ -350,6 +351,7 @@ export default class AliasSettings extends React.Component {
         return (
             <div className='mx_AliasSettings'>
                 {canonicalAliasSection}
+                <RoomPublishSetting roomId={this.props.roomId} canSetCanonicalAlias={this.props.canSetCanonicalAlias} />
                 <datalist id="mx_AliasSettings_altRecommendations">
                     {this._getLocalNonAltAliases().map(alias => {
                         return <option value={alias} key={alias} />;

src/components/views/room_settings/RoomPublishSetting.js

@@ -0,0 +1,60 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
+import {_t} from "../../../languageHandler";
+import {MatrixClientPeg} from "../../../MatrixClientPeg";
+
+export default class RoomPublishSetting extends React.PureComponent {
+    constructor(props) {
+        super(props);
+        this.state = {isRoomPublished: false};
+    }
+
+    onRoomPublishChange = (e) => {
+        const valueBefore = this.state.isRoomPublished;
+        const newValue = !valueBefore;
+        this.setState({isRoomPublished: newValue});
+        const client = MatrixClientPeg.get();
+
+        client.setRoomDirectoryVisibility(
+            this.props.roomId,
+            newValue ? 'public' : 'private',
+        ).catch(() => {
+            // Roll back the local echo on the change
+            this.setState({isRoomPublished: valueBefore});
+        });
+    };
+
+    componentDidMount() {
+        const client = MatrixClientPeg.get();
+        client.getRoomDirectoryVisibility(this.props.roomId).then((result => {
+            this.setState({isRoomPublished: result.visibility === 'public'});
+        }));
+    }
+
+    render() {
+        const client = MatrixClientPeg.get();
+
+        return (<LabelledToggleSwitch value={this.state.isRoomPublished}
+            onChange={this.onRoomPublishChange}
+            disabled={!this.props.canSetCanonicalAlias}
+            label={_t("Publish this room to the public in %(domain)s's room directory?", {
+              domain: client.getDomain(),
+            })} />);
+    }
+}

src/components/views/settings/tabs/room/GeneralRoomSettingsTab.js

@@ -21,7 +21,6 @@ import RoomProfileSettings from "../../../room_settings/RoomProfileSettings";
 import * as sdk from "../../../../..";
 import AccessibleButton from "../../../elements/AccessibleButton";
 import dis from "../../../../../dispatcher";
-import LabelledToggleSwitch from "../../../elements/LabelledToggleSwitch";
 import MatrixClientContext from "../../../../../contexts/MatrixClientContext";
 
 export default class GeneralRoomSettingsTab extends React.Component {
@@ -39,26 +38,6 @@ export default class GeneralRoomSettingsTab extends React.Component {
         };
     }
 
-    componentWillMount() {
-        this.context.getRoomDirectoryVisibility(this.props.roomId).then((result => {
-            this.setState({isRoomPublished: result.visibility === 'public'});
-        }));
-    }
-
-    onRoomPublishChange = (e) => {
-        const valueBefore = this.state.isRoomPublished;
-        const newValue = !valueBefore;
-        this.setState({isRoomPublished: newValue});
-
-        this.context.setRoomDirectoryVisibility(
-            this.props.roomId,
-            newValue ? 'public' : 'private',
-        ).catch(() => {
-            // Roll back the local echo on the change
-            this.setState({isRoomPublished: valueBefore});
-        });
-    };
-
     _onLeaveClick = () => {
         dis.dispatch({
             action: 'leave_room',
@@ -75,7 +54,6 @@ export default class GeneralRoomSettingsTab extends React.Component {
         const room = client.getRoom(this.props.roomId);
 
         const canSetAliases = true; // Previously, we arbitrarily only allowed admins to do this
-        const canActuallySetAliases = room.currentState.mayClientSendStateEvent("m.room.aliases", client);
         const canSetCanonical = room.currentState.mayClientSendStateEvent("m.room.canonical_alias", client);
         const canonicalAliasEv = room.currentState.getStateEvents("m.room.canonical_alias", '');
         const aliasEvents = room.currentState.getStateEvents("m.room.aliases");
@@ -96,15 +74,6 @@ export default class GeneralRoomSettingsTab extends React.Component {
                                    canSetCanonicalAlias={canSetCanonical} canSetAliases={canSetAliases}
                                    canonicalAliasEvent={canonicalAliasEv} aliasEvents={aliasEvents} />
                 </div>
-                <div className='mx_SettingsTab_section'>
-                    <LabelledToggleSwitch value={this.state.isRoomPublished}
-                                          onChange={this.onRoomPublishChange}
-                                          disabled={!canActuallySetAliases}
-                                          label={_t("Publish this room to the public in %(domain)s's room directory?", {
-                                              domain: client.getDomain(),
-                                          })} />
-                </div>
-
                 <span className='mx_SettingsTab_subheading'>{_t("Flair")}</span>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
                     <RelatedGroupSettings roomId={room.roomId}