[Epiphany] Most used bookmarks in Go menu

[Marco Pesenti Gritti <mpeseng tin it>]

We should decide if we want to keep them there ... I need to do some
code changes and dont want to do them for nothing ;)
Should they be in Bookmarks menu submenu instead ? Should they be
dropped completely ?

I think having a fast way to access most used bookmarks from a main menu
is nice, on the other hand there is nothing that suggest the list in Go
menu is the list of most used sites.

Opinions ?

Marco