Context
The draft namespace provides place for work-in-progress content.

Unfortunately, the draft namespace is not available in al Wikipedias, so it can be used only when it is available.

Narrative
As a user, I can create translations in a common place, so that they do not depend on my user and duplications are reduced.

Acceptance Criteria

1. For wikis with draft namespace enabled, in-progress translations are saved in the draft namespace.
2. For wikis with draft namespace enabled, anonymous users can create and publish translations.
3. For wikis without draft namespace support, translations will use the user namespace as usual.
4. The change should be transparent to the different CX processes:
   1. Processes that get translations across different wikis, should be aware of the possible locations.
   2. For wikis with draft namespace, a decision is made on what to do with the existing translations under the username space (deprecate, migrate, integrate...).