Improve handling of import queue template entries

According to user feedback, the current workflow to review templates on the import queue is not very efficient. Especially the need to switch between the queue listing and the form for the individual entries is slowing down work, as well as the need to copy-and-paste strings to define template names and translation domains.

Anticipated imporvement are:
- get suggestions on template name and translation domain based on the file name
- if the suggestoin is correct, the approval should occur right in the queue list display by changing the status of the entry.