[balsa] (8 commits) Non-fast-forward update to branch popover

[Peter Bloomfield <peterb src gnome org>]

The branch 'popover' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  bfe6e1b... pref-manager: Use GtkPopover for "Add" options
  1e40968... vfs: Port to GMenu
  9847bb9... libbalsa-vfs: New API to use with GMenu
  97fb2ac... various: Port to new LibBalsaVfs API
  0e0c6d7... body: Add a gpointer user_data member
  1fcf3c9... mblist: Port the MRU menu to GMenu
  a875deb... Various: Adapt to MRU menu changes

Commits added to the branch:

  acd8d62... main-window: Plug a GSlist leak (*)
  f5f4e19... pref-manager: Use GtkPopover for "Add" options
  c8739bc... vfs: Port to GMenu
  0fa004e... libbalsa-vfs: New API to use with GMenu
  b5224de... various: Port to new LibBalsaVfs API
  0dbe596... body: Add a gpointer user_data member
  1b1b20d... mblist: Port the MRU menu to GMenu
  ff4069c... Various: Adapt to MRU menu changes

(*) This commit already existed in another branch; no separate mail sent