Add support for Review fields with values

[Mnaukal]

• [x] Simplify reviewing: I removed the concept of "review", the publication list now only has "review fields" and the users can directly save values to them (which means all users see the same set of fields and values). I also removed "Step 4" from the top menu.
• [x] Support for text and numeric fields
• [x] Support for coding fields with autocomplete
• [x] Renaming/merging codes
• [ ] Support for other types of fields, e.g. boolean, single-select, multi-select.
• [x] Support for duplicating a field