We hide bookmarks bar when its empty.
We show it when it has items.
We will not add a user setting in account settings for them to hide/show it for now as a default, we may consider that later.
The user can add bookmarks in multiple ways.
In the channel menu, they have a bookmarks bar menu item with 2 submenu items for Add a link and Attach a file.
In the channel info RHS under the channel header.
Bookmarks overflow
If there are more bookmarks than space available, we show all a count next to the bookmarks, and we show all the bookmarks in the popover allowing people to drag things around.
Showing bookmarks on the channel info RHS
We do not need the drag/drop here.