Add small chat ui fixes (#6028)

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

plugins/chunter-resources/src/channelDataProvider.ts

@@ -197,6 +197,7 @@ export class ChannelDataProvider implements IChannelDataProvider {
     const isLoadingLatest = startPosition === undefined || startPosition === -1 || count - startPosition <= this.limit
 
     if (loadAll) {
+      this.isTailLoading.set(true)
       this.loadTail(undefined, combineActivityMessages)
     } else if (isLoadingLatest) {
       const startIndex = Math.max(0, count - this.limit)

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

@@ -68,6 +68,7 @@
   const minMsgHeightRem = 2
 
   const client = getClient()
+  const hierarchy = client.getHierarchy()
   const inboxClient = InboxNotificationsClientImpl.getClient()
   const contextByDocStore = inboxClient.contextByDoc
 
@@ -650,7 +651,7 @@
       {/if}
       <slot name="header" />
 
-      {#if displayMessages.length === 0}
+      {#if displayMessages.length === 0 && !hierarchy.isDerived(objectClass, activity.class.ActivityMessage)}
         <BlankView
           icon={chunter.icon.Thread}
           header={chunter.string.NoMessagesInChannel}

plugins/document-resources/src/components/DocumentIcon.svelte

@@ -14,23 +14,16 @@
 -->
 <script lang="ts">
   import { Asset } from '@hcengineering/platform'
-  import {
-    AnySvelteComponent,
-    Icon,
-    IconFolder,
-    IconSize,
-    IconWithEmoji,
-    getPlatformColorDef,
-    themeStore
-  } from '@hcengineering/ui'
+  import { AnySvelteComponent, Icon, IconSize, IconWithEmoji, getPlatformColorDef, themeStore } from '@hcengineering/ui'
   import view, { IconProps } from '@hcengineering/view'
+  import document from '@hcengineering/document'
 
   import { ComponentType } from 'svelte'
 
   export let value: IconProps
   export let size: IconSize
   export let iconWithEmoji: AnySvelteComponent | Asset | ComponentType | undefined = view.ids.IconWithEmoji
-  export let defaultIcon: AnySvelteComponent | Asset | ComponentType = IconFolder
+  export let defaultIcon: AnySvelteComponent | Asset | ComponentType = document.icon.Document
 </script>
 
 <Icon