workflows: dismissable approval alert

* Makes the default approval alert dismissable.

Reviewed-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: task result templates

* Amends task result rendering in Holding Pen to use templates
  under the folder templates/workflows/results.

* Fixes a problem in refextract task.

* Adds refextract template.

* Adds template for fulltext_download task to display a nicer looking
  fulltext icon to users.

* Amends tests to accommodate this new change.

Reviewed-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: task result upgrade

* NOTE Adds an update script to change task results from being an
  WorkflowsTaskResult instance to a dict.

* Removes WorkflowsTaskResult class.

* Changes task results to no longer be grouped by last_task_name in
  order to support adding task results outside of workflows tasks.

* Updates documentation with new information on task results as well
  as actions, workers, extra_data.

* Renames actions API function add_action() to set_action() to better
  describe what the function does.

* Adds a test case for this new functionality.

* Factors out a function in utils to get rendered task results from the
  blueprint.

* Simplifies the "heavy" workflow definitions a bit.

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

* Adds buttons for going to previous/next workflow object
  in the Holding Pen detailed display. The previous/next
  functionality is based from the state of the maintable
  order.

Tested-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: previous/next amendment

* Moves the previous/next buttons to the nav bar on
  Holding Pen detailed display.

* Factors out some code to separate functions.

* Removes unused workflows.css.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
workflows: better workflow representation

* Calculates the path of tasks that workflow has
  followed and represents with different colors
  the completed, last and blocked tasks.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: task description added

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: modal fix

* Fixes the modal paragraph with the task details.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: added a decorator

* Adds a decorator to pass the atributes of a
  function to its closure.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>