workflows: actions JS loading

* Makes the JavaScript assets loading for actions separated from
  the general assets loading to allow for easier additions of
  actions on overlays.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
workflows: documentation enrichment

* Enriches the documentation of the Workflows module by adding
  more information on actions and the Holding Pen.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
utils: datacite ssl protocol fix

* Fixes issue with SSL protocol version due to change by DataCite.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
debug_toolbar: error reporting fix

* Fixes an issue where an error message would be produced even if
  Flask-DebugToolbar was explicitly disabled via DEBUG_TB_ENABLED
  set to False.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
email: celery error email fix

* Fixes issue with celery not sending error emails due to config
  variable ADMIN being set different by the Flask Email extension.

Signed-off-by: Lars Holm Nielsen <lars.holm.
webhooks: minor documentation update

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
tests: testsuite iteration fix

* Fixes invalid attribute access to application configuration.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
search: requirejs facets fix

* Wraps facets JavasScript module in requirejs definition.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: jquery datepicker leftovers

* Removes jQueryUI css which is no longer needed after integrating
  bootstrap-datetimepicker.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: form button click fix

* Fixes refactoring issue with form button clicks not being sent to
  server.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: field_display kwargs support

* Adds support for passing kwargs to Jinja macro field_display
  that can pass it to the field. This is useful for passing
  attributes to specific field widgets like (e.g. rows/cols
  for a textarea).

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: js uploader component

* Adds flightjs uploader component with support for pluggable
  uploader engines such as PLUpload and DropBox.

* NOTE RequireJS path to FlightJS was changed from vendors/flight/lib
  to vendors/flight. Scripts defining flight components MUST update
  their require statement from require('flight/lib/component') to
  require('flight/component').

Reviewed-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
Signed-off-by: Adrian Pawel Baran <adrian.pawel.baran@cern.ch>