collapse Ext. Logbook menu items for better visualization

[emics]

Discussed in #3148

^{Originally posted by emics June 18, 2024}
using Cloudlog from an old laptop, that has a resolution of 1024x768, the menu is cut off and you have to scroll down the page to see all the items and you often lose the focus of the menu.

Could it be useful to collapse all the items relating to External Logbooks into a single entry (like Other Export Options item)?
If necessary I can take care of it directly.