Please provide user a possibility to organize Navigator objects by several tabs.
For example, I need to jump to a chapter or a table during I'm working within a 
really large list of bookmarks and then return back to the bookmark. In this 
case I have to first scroll the Navigator to Headings or Tables list and then 
scroll the Navigator back to the bookmark (I should remember an exact name of 
the bookmark, I worked on). In this situation it would be more convenient to 
send the large bookmark list to a separate tab and switch tabs instead of 
scrolling the Navigator tree.
My proposal is to add to the Navigator right-click menu a command "Send to 
Tab", that will open a new tab and move a selected type objects list into the 
tab. The tab should be designated for one object type only. The Navigator 
button set may depend on active tab object type. This type objects list in the 
Navigator main tab should be collapsed and the list caption will also work as 
link to the tab. The list will be available to expand after type designated tab 
closing.

Thanks