Refactores work package's routing specs
Moves context menu to work package
Adds rake tasks for migration preparation
Adds adjuvant error messages
Moves tests to specs
Fixes specs
Set order for postgres
Add responsible Server Side Filter.
Introduces status filters in timeline UI.
paginate statuses in api/v2.
Removes client-side filter for responsibles.
Improves cuke to run faster.

The new timeline will render much faster, additionally, the scenario
name was fixed from the previous copy/paste duplucation.
status display. server side filter.
Merge branch 'feature/server-side-filters' of github.com:opf/openproject into feature/server-side-filters
no none elements no more.

for types.
Supports non-interactive shell
-1 filters for null values.
Adds cukes for responsible filter.
Handles errors in rake tasks
Modals can be easily used in the whole app

- always include modal javascript
- adapted timelines javascript