UBERF-5628: fix unexpected Reference object in Activity on mentions in description (#4753)

Signed-off-by: Kristina Fefelova <kristin.fefelova@gmail.com>

models/chunter/src/index.ts

@@ -559,6 +559,19 @@ export function createModel (builder: Builder, options = { addApplication: true
     chunter.ids.BacklinkCreatedActivityViewlet
   )
 
+  builder.createDoc(
+    activity.class.DocUpdateMessageViewlet,
+    core.space.Model,
+    {
+      objectClass: chunter.class.Backlink,
+      action: 'update',
+      component: chunter.component.BacklinkContent,
+      labelComponent: chunter.activity.BacklinkCreatedLabel,
+      hideIfRemoved: true
+    },
+    chunter.ids.BacklinkUpdateActivityViewlet
+  )
+
   builder.createDoc(
     activity.class.DocUpdateMessageViewlet,
     core.space.Model,

models/chunter/src/plugin.ts

@@ -89,6 +89,7 @@ export default mergeIds(chunterId, chunter, {
     TxChatMessageRemove: '' as Ref<TxViewlet>,
     ChunterNotificationGroup: '' as Ref<NotificationGroup>,
     BacklinkCreatedActivityViewlet: '' as Ref<DocUpdateMessageViewlet>,
+    BacklinkUpdateActivityViewlet: '' as Ref<DocUpdateMessageViewlet>,
     BacklinkRemovedActivityViewlet: '' as Ref<DocUpdateMessageViewlet>
   },
   activity: {

plugins/chunter-resources/src/components/ChannelScrollView.svelte

@@ -343,6 +343,8 @@
       return
     }
 
+    updateSelectedDate()
+
     if (selectedMessageId !== undefined && messages.some(({ _id }) => _id === selectedMessageId)) {
       isScrollInitialized = true
       await wait()
@@ -465,7 +467,7 @@
     {#if startFromBottom}
       <div class="grower" />
     {/if}
-    {#if withDates && selectedDate}
+    {#if withDates && displayMessages.length > 0}
       <div class="ml-2 pr-2">
         <JumpToDateSelector {selectedDate} fixed on:jumpToDate={jumpToDate} />
       </div>

plugins/chunter-resources/src/components/JumpToDateSelector.svelte

@@ -59,6 +59,7 @@
     position: relative;
     flex-shrink: 0;
     margin: 0.25rem 0;
+    height: 1.875rem;
 
     &:not(:first-child)::after {
       position: absolute;