Added ability to switch project view from list to board.
At 'All projects' page board view is disabled.
Reordering cards in Unsorted column currently is not working because i don't know how it should be implemented. Order of tasks in column is defined in relevant status object (tasks field) and unsorted tasks do not belong to any status so their order is undefined.
statusobject (tasksfield) and unsorted tasks do not belong to any status so their order is undefined.⚠️ For correct work migration should be applied
resolves #77