onTileUpdate -> onMessageAllowed

We keep onTileUpdate in MessgeEvent because it's a generic thing for the class to handle. onMessageAllowed is slightly different than onShowAllowed because "show allowed" doesn't quite make sense on its own, imo.

src/components/views/messages/MessageEvent.js

@@ -112,7 +112,7 @@ module.exports = createReactClass({
             replacingEventId={this.props.replacingEventId}
             editState={this.props.editState}
             onHeightChanged={this.props.onHeightChanged}
-            onTileUpdate={this.onTileUpdate}
+            onMessageAllowed={this.onTileUpdate}
         />;
     },
 });

src/components/views/messages/MjolnirBody.js

@@ -21,7 +21,7 @@ import {_t} from '../../../languageHandler';
 export default class MjolnirBody extends React.Component {
     static propTypes = {
         mxEvent: PropTypes.object.isRequired,
-        onTileUpdate: PropTypes.func.isRequired,
+        onMessageAllowed: PropTypes.func.isRequired,
     };
 
     constructor() {
@@ -34,7 +34,7 @@ export default class MjolnirBody extends React.Component {
 
         const key = `mx_mjolnir_render_${this.props.mxEvent.getRoomId()}__${this.props.mxEvent.getId()}`;
         localStorage.setItem(key, "true");
-        this.props.onTileUpdate();
+        this.props.onMessageAllowed();
     };
 
     render() {