Change the Workflow of a motion in CreateView.

The Manager can choose the workflow in the createview. The default value
is the workflow from the config.

In the UpdateView the workflow in which the motion is, is choosen by
default.

The workflow will only be reset, if it is changed.
Merge pull request #736 from ostcar/motion-form-workflow

Change the Workflow of a motion in CreateView.
Editview for releated agenda items.

Releated Agenda Items need there own edit view to edit some agenda specifc
values.

Also added a new filter 'trans' to translate variables.

Fixes #710
Merge pull request #735 from ostcar/Issue-710

Editview for releated agenda items.