As an Administrator, I want to bulk edit configurable lists

As an administrator with intense legacy data that migrated into our customizable lists. As an example, the extent_extent_type list has 996 terms and I've already individually deleted or merged hundreds of additional terms.

1. I would like to be able to merge multiple "dirty" terms into the correct term. Example: be able to select "liner feet," "ln. ft.," and "linea feet" to simultaneously merge into Linear Feet.

2. I would like to select multiple terms to delete.

3. I would like to delete suppressed terms without having to first unsuppress them

4. After completing and saving an action, I would like to be returned to the term above or below where I was working, rather than returned to the top of the list.