[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:

  bfeeee2... pref-manager: Use GtkPopover for "Add" options
  d9103a1... vfs: Port to GMenu
  5efb1ff... libbalsa-vfs: New API to use with GMenu

Commits added to the branch:

  0ae0fde... Improve TLS certificate validation error message (*)
  e9d6610... Merge branch 'invald_tls_cert_message' into 'master' (*)
  dcab903... Update Ukrainian translation (*)
  29b4741... Updated Spanish translation (*)
  aa25520... pref-manager: Use GtkPopover for "Add" options
  3721b2f... vfs: Port to GMenu
  9286421... libbalsa-vfs: New API to use with GMenu
  8569bc9... balsa-mblist and friends: Start porting to GMenu

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