PLT-2973 Fix Channel view doesn't scroll to New Messages indicator on first load (#3151)

webapp/components/post_view/post_view_controller.jsx

@@ -48,7 +48,7 @@ export default class PostViewController extends React.Component {
             profiles,
             atTop: PostStore.getVisibilityAtTop(channel.id),
             lastViewed,
-            scrollType: ScrollTypes.BOTTOM,
+            scrollType: ScrollTypes.NEW_MESSAGE,
             displayNameType: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, 'name_format', 'false'),
             displayPostsInCenter: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, Preferences.CHANNEL_DISPLAY_MODE, Preferences.CHANNEL_DISPLAY_MODE_DEFAULT) === Preferences.CHANNEL_DISPLAY_MODE_CENTERED,
             compactDisplay: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, Preferences.MESSAGE_DISPLAY, Preferences.MESSAGE_DISPLAY_DEFAULT) === Preferences.MESSAGE_DISPLAY_COMPACT
@@ -132,7 +132,7 @@ export default class PostViewController extends React.Component {
                 displayNameType: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, 'name_format', 'false'),
                 displayPostsInCenter: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, Preferences.CHANNEL_DISPLAY_MODE, Preferences.CHANNEL_DISPLAY_MODE_DEFAULT) === Preferences.CHANNEL_DISPLAY_MODE_CENTERED,
                 compactDisplay: PreferenceStore.get(Preferences.CATEGORY_DISPLAY_SETTINGS, Preferences.MESSAGE_DISPLAY, Preferences.MESSAGE_DISPLAY_DEFAULT) === Preferences.MESSAGE_DISPLAY_COMPACT,
-                scrollType: ScrollTypes.BOTTOM
+                scrollType: ScrollTypes.NEW_MESSAGE
             });
         }
     }
@@ -241,6 +241,7 @@ export default class PostViewController extends React.Component {
                     displayNameType={this.state.displayNameType}
                     displayPostsInCenter={this.state.displayPostsInCenter}
                     compactDisplay={this.state.compactDisplay}
+                    lastViewed={this.state.lastViewed}
                 />
             );
         }