Fix sentMessageAndIsAlone by dispatching `message_sent` more consistently

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/emojipicker/ReactionPicker.js

@@ -18,6 +18,7 @@ import React from 'react';
 import PropTypes from "prop-types";
 import EmojiPicker from "./EmojiPicker";
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
+import dis from "../../../dispatcher/dispatcher";
 
 class ReactionPicker extends React.Component {
     static propTypes = {
@@ -105,6 +106,7 @@ class ReactionPicker extends React.Component {
                     "key": reaction,
                 },
             });
+            dis.dispatch({action: "message_sent"});
             return true;
         }
     }

src/components/views/messages/ReactionsRowButton.js

@@ -22,6 +22,7 @@ import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import * as sdk from '../../../index';
 import { _t } from '../../../languageHandler';
 import { formatCommaSeparatedList } from '../../../utils/FormattingUtils';
+import dis from "../../../dispatcher/dispatcher";
 
 export default class ReactionsRowButton extends React.PureComponent {
     static propTypes = {
@@ -60,6 +61,7 @@ export default class ReactionsRowButton extends React.PureComponent {
                     "key": content,
                 },
             });
+            dis.dispatch({action: "message_sent"});
         }
     };
 

src/components/views/rooms/EditMessageComposer.js

@@ -190,6 +190,7 @@ export default class EditMessageComposer extends React.Component {
             const roomId = editedEvent.getRoomId();
             this._cancelPreviousPendingEdit();
             this.context.sendMessage(roomId, editContent);
+            dis.dispatch({action: "message_sent"});
         }
 
         // close the event editing and focus composer

src/components/views/rooms/SendMessageComposer.js

@@ -312,6 +312,7 @@ export default class SendMessageComposer extends React.Component {
                     event: null,
                 });
             }
+            dis.dispatch({action: "message_sent"});
         }
 
         this.sendHistoryManager.save(this.model);