Opening Reports (or any action types) fails
On sao it generates: `jQuery.Deferred exception: next_view is null get next_view_type`
On tryton:
```
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/view/list.py", line 1073, in __sig_switch
if not self.screen.row_activate() and self.children_field:
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/main.py", line 724, in menu_row_activate
return Action.exec_keyword('tree_open', {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/ced/Projects/tryton-7.4/tryton/tryton/action/main.py", line 176, in exec_keyword
Action.execute(action, data, context=context)
File "/home/ced/Projects/tryton-7.4/tryton/tryton/action/main.py", line 54, in execute
Action._exec_action(action, data, context=context)
File "/home/ced/Projects/tryton-7.4/tryton/tryton/action/main.py", line 139, in _exec_action
Window.create(res_model, **params)
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/window.py", line 32, in create
win = Form(model, **attributes)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/form.py", line 76, in __init__
self.screen.search_filter()
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/screen/screen.py", line 325, in search_filter
self.clear()
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/screen/screen.py", line 1205, in clear
self.current_record = None
^^^^^^^^^^^^^^^^^^^
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/screen/screen.py", line 500, in __set_current_record
self.record_message(
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/screen/screen.py", line 467, in record_message
window.record_message(position, size, max_size, record_id)
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/form.py", line 582, in record_message
next_view_type = self.screen.next_view_type
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/ced/Projects/tryton-7.4/tryton/tryton/gui/window/view_form/screen/screen.py", line 551, in next_view_type
next_view = next_view.view_type
^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'view_type'
```
This is because the view to load has no type.
issue