[balsa] (10 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:

  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
  a8257c8... compose window: Break the attachment context menu
  51678d4... balsa-index: Port context menu to GtkPopover

Commits added to the branch:

  774ba0e... main-window: Avoid a crash (*)
  510ac2d... pref-manager: Use GtkPopover for "Add" options
  fb56877... vfs: Port to GMenu
  d062037... libbalsa-vfs: New API to use with GMenu
  d00c2d1... various: Port to new LibBalsaVfs API
  c37b7e4... body: Add a gpointer user_data member
  c07f896... mblist: Port the MRU menu to GMenu
  518ae91... Various: Adapt to MRU menu changes
  67a48fe... compose window: Break the attachment context menu
  fc26199... balsa-index: Port context menu to GtkPopover

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