I use the Bookmarks Toolbar for all of my desktop bookmarks. I frequently create new bookmarks or refile bookmarks by dragging them and dropping them into the appropriate subfolder in the toolbar. While navigating through multiple layers of bookmark subfolders, I often accidentally slide the new bookmark a few pixels above or to the side of the submenu, briefly hovering over the browser window surrounding the expanded menus. After a fraction of a second, all of the submenus collapse and I have to start over.

Is there any ui tweak available to insert a delay into this submenu collapse? I have already tried changing ui.submenuDelay and ui.click_hold_context_menus.delay, but neither of those had any effect on this issue.