I have started to hack the find-and-replace package and found an oddity.
In the menus/find-and-replace.cson you can find multiple “separators”:
{ 'type': 'separator' }
{ 'label': 'Find in Project', 'command': 'project-find:show'}
{ 'type': 'separator' }
but only one such separator is shown in the Find menu.