Create a batch from filtered outputs

[arthur-flam]

User often do lots of parameter tuning. What some would like is create a new batch from filtered results (e.g. my_param: best_value), so that they can save them as a milestone with a descriptive name.

TODO

• Add a "Move filtered outputs" menu item, next to the "Rename batch" item, and much like it.
• Send a request with the commit, batch, filter.
• Get the params in the API
• Add the necessary logic to backend.models.Batch.rename(): get_or_create a batch with the target name and move results there.
• Fix: currently we don't check if the user uses a name that's already used when renaming. Let's implement a "move" in this case. The logic for normal/filtered cases can be unified while doing this.

[arthur-flam]

Done in the last release