Merge values

[esyriani]

Anywhere there is a list, e.g., Venues, Authors, Reference Categories, except Papers, it should be possible to merge values into one. For example, we have two authors, Homer Simpson and H Simpson. We want to merge both into Homer Simpson.

1. Add a checkbox on each row (e.g., next to View/Delete) to select the desired values, such as the 2 Simpson authors.
2. At the top of the page, next to the add "+" button, add a Merge button.
3. This pops a window asking to select which value to keep.
4. Selecting Homer Simpson and pressing OK changes all foreign keys that were pointing to H Simpson to now point to Homer Simpson and deletes the H Simpson entry.