The Rank widget uses method name as id as setting

**What's wrong?**

`method.name` is a string, like, `"Univariate Regression"` and is translated, yet it is also used as a setting, therefore causing crashes (like presumably #7306) when opening a workflow in another language.

**How can we reproduce the problem?**

See, e.g. https://github.com/biolab/orange3/blob/master/Orange/widgets/data/owrank.py#L264.

**What's your environment?**

- Operating system: N/A
- Orange version: 3.40
- How you installed Orange: N/A

Start at Orange/widgets/data/owrank.py around line 264 and inspect how method.name is used both as a translated label and as a setting. Reproduce by opening a workflow in another language, then verify that the Rank widget uses a stable setting identifier and no longer crashes.

Written by the indexing model from the issue text.