Channels: Unread posts state not changed if not loaded.

[NyvenZA]

Tested on Master 1350 (PR 1989) and Master 1383

I suspect that "Mark as read" doesn't work on posts in channels that are not loaded.
The Channel list also doesn't display the Count of unread messages until you view a different channel and come back.

• Subscribed to a channel with many ( more than 100 posts).
• The Number of unread posts are not displayed on the Channels list.
• Right click on the channel and select "Mark all as Read"

Now the list number of unread messages are displayed.

The posts in the channel is not updated as read while you are in the channel.
Clicking on a different channel and coming back to the channel shows that the posts that were loaded on the previous view are marked as read.

The Number of unread posts in the channel list is still most of the entries, since most were not marked as read.

Work around:

• Scroll down to load all the post

• Right click "Mark all as read"
  The progress spinning progress now shows
  All the entries that were loaded are now marked as read.
  The Count of unread messages now updates.

• There is some posts that just show Loading... if i scroll to fast.