Remove unused AJAX endpoints
Remove unused function import
Factor out auto-editor nomination check

Factor out checking whether a user can nominate another user for
auto-editor status into a function "can_nominate".
MBS-7517: Don't call a deleted user "limited user"

On the profile page for a deleted user, the type was shown as "Limited
User". This is changed to "Deleted User" instead.
Add series and instruments as linkable entities in annotations (MBS-7570)
Merge remote-tracking branch 'nikki-bitbucket/mbs-7570' into beta

* nikki-bitbucket/mbs-7570:
  Add series and instruments as linkable entities in annotations (MBS-7570)
Merge remote-tracking branch 'chirlu/mbs-7517' into beta

* chirlu/mbs-7517:
  MBS-7517: Don't call a deleted user "limited user"
  Factor out auto-editor nomination check
Merge remote-tracking branch 'chirlu/remove_dead_code' into beta

* chirlu/remove_dead_code:
  Remove unused function import
  Remove unused AJAX endpoints
Update pot files using current code and production database.
Update translations from transifex.